RHESSI Science Nuggets

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Welcome to the [[RHESSI Science Nuggets]]: science notes from [[RHESSI]].  The following is a time-ordered list of the latest Nuggets added to the wiki.  An [[:Category:Nugget|alphabetical list of wiki Nuggets]] is also available.  If you are looking for older Nuggets than please visit the [http://sprg.ssl.berkeley.edu/~tohban/nuggets/ <b>original series</b> of  RHESSI Science Nuggets] and use the search facilities there; for this new series of Nuggets in the Wiki format, use your browser's search facility for title words or authors.
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Welcome to the [[RHESSI Science Nuggets]]: science notes from [[RHESSI]].  The following is a time-ordered list of the latest Nuggets added to the wiki.  An [[:Category:Nugget|alphabetical list of wiki Nuggets]] is also available as well as [[:Category:RHESSI Nugget List|yearly lists]]. We welcome volunteer authors - please see our page of [[Help:For_Authors| help for authors]]
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We welcome volunteer authors - please see our page of [http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Help:For_Authors help for authors].
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Please note that each Nugget page has a <font color="Red">Discussion</font> page, which sometimes has really interesting information.
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|title = Mars Odyssey/HEND and RHESSI
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|title = Is there HOPE for Hyder flares...
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|number = 202
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|number = 468
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|first_author = V. Vybornov,
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|first_author = Hugh HUDSON
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|second_author = M. Livshits
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|publish_date = 15 March 2024
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|publish_date = 9 June 2013
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|description = Filament eruptions/Hyder flares/<i>disparitions brusques</i> may all show HOPE
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|description = An event from far behind the solar limb, observed at Mars
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|image=Icon468.png}}
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|image = Icon202.png}}
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|title = Hard X-rays in Descent
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|title = Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using H-alpha and EUV Spectra Taken by SMART/SDDI and SDO/EVE
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|number = 201
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|number = 467
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|first_author = Aidan O'Flannagain,
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|first_author = Takato OTSU
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|second_author = John Brown and Peter Gallagher
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|publish_date = 19 February 2024
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|publish_date = 27 May 2013
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|description = Whole-Sun spectroscopic observations can readily detect ejecta
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|description = A novel test of the thick-target model
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|image=Icon467.png}}
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|image = Icon200.png}}
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|title = Too few? Too many?
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|title = Unexpected Asymmetry in GeV Emission
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|number = 200
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|number = 466
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|first_author = Paulo Simões
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|first_author = Bruno ARSIOLI and Elena ORLANDO
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|second_author = and Eduard Kontar
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|publish_date = 15 January 2024
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|publish_date = 13 May 2013
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|description = The high-energy solar gamma radiation shows inexplicable but fascinating properties
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|description = Too few electrons in the footpoints; too many electrons in the corona
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|image=Icon466.png}}
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|image = Icon201.png}}
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|title = A huge gamma-ray burst
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|title = When it rippled in one place and exploded in another
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|number = 199
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|number = 465
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|first_author = David Smith
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|first_author = Ivan ZIMOVETS
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|second_author = and Andr&eacute; Csillaghy
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|publish_date = 25 December 2023
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|publish_date = 6 May 2013
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|description = Pulsations precede a flare, but seem unrelated
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|description = A wonderfully bright gamma-ray burst at Z = 0.34
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|image=Icon465.png}}
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|image = Icon199.png}}
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|title = Three-phase life leads to corpulent X-ray loops
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|title = Solar flares: evaporation and simulation‎
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|number = 198
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|number = 464
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|first_author = Natasha Jeffrey
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|first_author = Malcolm DRUETT
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|second_author = and Eduard Kontar
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|publish_date = 18 December 2023
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|publish_date = 15 April 2013
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|description = Fitting beam electrons into multi-dimensional models
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|description = RHESSI observations explore structural changes in flaring loops
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|image=Icon464.png}}
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|image = Icon198.png}}
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|title = Antipodal Flares
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|title = Pre-impulsive and Impulsive Phases of the March 28, 2022 Sub-Terahertz Flare
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|number = 197
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|number = 463
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|first_author = B. Pecos
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|first_author = Galina G. MOTORINA
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|second_author = and B. Paul
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|publish_date = 11 December 2023
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|publish_date = 1 April 2013
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|description = A flare with an increasing sub-THz spectrum and sub-THZ precursor information
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|description = Flares on a solar diameter suggest a new subatomic particle
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|image=Icon463.png}}
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|image = Icon197.png}}
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|title = Observational evidence for breakout reconnection
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|title = Coronal Bright Points
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|number = 196
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|number = 462
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|first_author =Henry Aurass
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|first_author = Daniel N&Oacute;BREGA-SIVERIO
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|second_author = and Gordon Holman
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|publish_date = 27 November 2023
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|publish_date = 18 March 2013
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|description = Bright EUV rowel-like structures can result from null-point reconnection
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|description = Coronal particle acceleration marks the eruption of a SEE
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|image=Icon462.png}}
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|image = Icon196.png}}
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|title = Burst-on-Tail (BOT)
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|title = Aurora-like Radio Emission from a Sunspot
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|number = 195
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|number = 461
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|first_author = Alex Struminsky
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|first_author = Sijie YU
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|second_author = and Ivan Zimovets
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|publish_date = 20 November 2023
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|publish_date = 4 March 2013
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|description = Maser action above a sunspot
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|description = A "Burst-on-Tail" (BOT) phenomenon
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|image=Icon461.png}}
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|image = Icon195.png}}
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|title = Electron re-acceleration and HXR emission
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|title = Search for a Flare Anticipation Index (FAI)
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|number = 194
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|number = 460
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|first_author = Heather Ratcliffe
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|first_author = Hugh HUDSON
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|second_author = and Marian Karlick&yacute;
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|second_author = and Jim McTiernan
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|publish_date =18 February 2013
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|publish_date = 13 November 2023
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|description = Can wave-particle interactions solve the electron number problem?
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|description = Quantifying flare precursors on a few-minute time scale
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|image = Icon194.png}}
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|image=Icon460.png}}
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|title = Passages of Electron Beams
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|title = Bouncing motions of fast electrons using Nobeyama Radioheliograph
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|number = 193
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|number = 459
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|first_author = Bin Chen
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|first_author = Keitarou MATSUMOTO
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|second_author = and Tim Bastian
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|publish_date = 6 November 2023
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|publish_date =11 February 2013
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|description = Solar evidence for conservation of second adiabatic invariant in particle motion
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|description = New VLA capability for imaging spectroscopy shows several remarkable features of type III bursts
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|image=Icon459.png}}
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|image = Icon193.png}}
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|title = Kappa Distribution
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|title = Impact of nanoflare heating in the lower solar atmosphere
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|number = 192
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|number = 458
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|first_author = Mitsuo Oka
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|first_author = Helle BAKKE
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|second_author =
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|publish_date = 30 October 2023
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|publish_date =21 January 2013
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|description = The behavior of nanoflare fast electrons in Bifrost models
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|description = A simpler function fits both thermal and nonthermal RHESSI spectral ranges
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|image=Icon458.png}}
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|image = Icon192.jpg}}
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|title = Hard X-ray Spikes Observed by RHESSI
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|title =   Precise timing of flare footpoint sources from mid-infrared observations‎
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|number = 191
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|number = 457
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|first_author = Jiong Qiu
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|first_author = Paulo SIM&Otilde;ES et al.
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|second_author =
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|publish_date = 23 October 2023
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|publish_date =7 January 2013
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|description = Mid-IR observations at high spatial and high temporal resolution: Conjugacy
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|description = New software allows RHESSI to study rapid time variations
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|image=Icon457.png}}
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|image = Icon191.png}}
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|title = Flare Productivity
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|title =   The Greatest GOES Flares‎
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|number = 190
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|number = 456
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|first_author = Hugh Hudson
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|first_author = Hugh HUDSON
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|second_author = and Lyndsay Fletcher
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|second_author = and Ed CLIVER
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|publish_date =27 December 2012
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|publish_date = 25 September 2023
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|description = An anomalous change in flare productivity per active region
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|description = The greatest GOES events, re-analyzed, fall short of expectations
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|image = Icon190.png}}
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|image=Icon456.png}}
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|title = FOXSI Success
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|title =   Introducing SunSketcher
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|number = 189
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|number = 455
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|first_author = Lindsay Glesener
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|first_author = Hugh HUDSON
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|second_author = and S&auml;m Krucker
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|second_author = and Gordon EMSLIE
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|publish_date =27 December 2012
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|publish_date = 11 September 2023
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|description = The FOXSI rocket soars, and a flare occurs on schedule
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|description = Galloping towards roundup in the 2024 total solar eclipse
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|image = Icon189.png}}
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|image=Icon455.png}}
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|title = "Impulse Response Flares" and Gamma Rays
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|title =   TeV Gamma rays from the Quiescent Sun
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|number = 188
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|number = 454
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|first_author = Stephen White
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|first_author = Mehr Un NISA
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|second_author = and Hugh Hudson
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|second_author = and John BEACOM
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|publish_date =13 November 2012
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|publish_date = 21 August 2023
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|description = A simplifying paradigm may describe acceleration to the highest energies in flares
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|description = Solar photons at unprecedented high energies
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|image = Icon188.png}}
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|image=Icon454.png}}
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|title = Glasgow Callisto optimistic: first light comes in focus
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|title =   Temporal and Spatial Characteristics of Hard X-Ray Sources in Flare Model with Vertical Current Sheet
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|number = 187
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|number = 453
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|first_author = Heather Ratcliffe
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|first_author = Alexander SHABALIN, Eugenia OVCHINNIKOVA,
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|second_author = and Eduard Kontar
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|second_author = and Yuri CHARIKOV
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|publish_date =29 October 2012
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|publish_date = 7 August 2023
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|description = The Glasgow Callisto radio observatory is on line
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|description = Modeling betatron acceleration in current-sheet development.
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|image = Icon187.png}}
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|image=Icon453.png}}
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|title = Photospheric Temperature Gradient
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|title =   Spatial Distribution of Magnetic Reconnection Rate in an M6.5 Solar Flare
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|number = 186
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|number = 452
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|first_author = Martin Fivian
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|first_author = Ju JING
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|second_author = and Hugh Hudson
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|publish_date = 12 June 2023
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|publish_date =22 October 2012
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|description = Linking hard X-rays to high-resolution images that show reconnection rates.
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|description = RHESSI observes the photosphere with exquisite precision
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|image=Icon452.png}}
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|image = Icon186.png}}
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|title = Energy Partition in Large Solar Eruptive Events
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|title =   Statistical study of Type III bursts and associated HXR emissions
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|number = 185
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|number = 451
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|first_author = Gordon Emslie
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|first_author = Nicole VILMER and Tomin JAMES
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|second_author = and Brian Dennis
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|publish_date = 29 May 2023
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|publish_date =5 October 2012
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|description = Linking electron populations escaping from the Sun with those that RHESSI detects.
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|description = Where the flare energy comes from, and where it goes to.
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|image=Icon451.png}}
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|image = Icon185.png}}
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|title = New TGFs Found in the RHESSI Data
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|title =   Solar flare hard X-rays from the anchor points of an eruptive filament
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|number = 184
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|number = 450
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|first_author = Thomas Gjesteland
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|first_author = Muriel STIEFEL
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|second_author = and Nikolai &Oslash;stgaard
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|publish_date = 15 May 2023
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|publish_date =10 September 2012
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|description = A rare "four-ribbon" flare has been detected in hard X-rays.
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|description = RHESSI sees many, many gamma-ray flashes from lightning
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|image=Icon450.png}}
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|image = Icon184.png}}
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|title = The RHESSI Flare Catalog
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|title =   Did a Solar Flare Accelerate all the Ambient Electrons in the Coronal Acceleration Region?...
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|number = 183
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|number = 449
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|first_author = Jim McTiernan
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|first_author = Gordon EMSLIE, Eduard KONTAR,
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|second_author = and Hugh Hudson
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|second_author = Galina MOTORINA, and Brian DENNIS
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|publish_date = 29 August 2012
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|publish_date = 1 May 2023
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|description = The Catalog is a powerful and easy-to-use access tool for the RHESSI flare observations
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|description = Considering SOL2017-09-10, probably not.
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|image = Icon183.png}}
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|image=Icon449.png}}
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|title = RHESSI Catches Gamma-Ray Bursts
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|title =   Diagnostics of Spatially-Extended Turbulent Acceleration and Transport
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|number = 182
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|number = 448
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|first_author = Jakub Ripa
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|first_author = Morgan STORES
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|second_author =
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|publish_date = 24 April 2023
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|publish_date = 15 August 2012
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|description = Drilling down into the detailed structure of solar-flare energy release by including turbulence with particle acceleration.
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|description = RHESSI catches gamma-ray bursts, and they come in three flavors
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|image=Icon448.png}}
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|image = Icon182.jpg}}
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|title = Dense Loop Flares
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|title =   RHESSI's Re-entry
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|number = 181
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|number = 447
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|first_author = Jingnan Guo
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|first_author = Pascal SAINT-HILAIRE and
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|second_author = and Gordon Emslie
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|second_author = Hugh HUDSON
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|publish_date =6 August 2012
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|publish_date = 17 April 2023
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|description = Direct electron mapping teaches us about the structure of electron acceleration in flares
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|description = The final demise of RHESSI is this week
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|image = Icon181.png}}
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|image=Icon447.png}}
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|title = The Slowest Flare
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|title =   A Glasgow geomagnetic observation of a solar flare
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|number = 180
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|number = 446
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|first_author = Sam Freeland
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|first_author = Hugh HUDSON, John MALONE-LEIGH,
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|second_author = and Hugh Hudson
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|second_author = Graham WOAN, and Chris OSBORNE
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|publish_date =23 July 2012
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|publish_date = 13 March 2023
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|description = A flare with an exceptionally slow rise phase, more than 5 hours in GOES 1-8 A soft X-rays
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|description = Irish and Scottish geomagnetic observatories see a crochet much like that of the Carrington event
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|image = Icon180.png}}
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|image=Icon_446.png}}
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|title =  Particle Acceleration in Two Coronal Jets
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|number = 445
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|first_author = Yixian ZHANG
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|publish_date =  27 February 2023
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|description = Coronal jets with hard X-ray sources at disjoint locations
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|image=Icon445.png}}
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|title = Dimmings and Sustained Gamma-Ray Events
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|title =   The Curious First Sunquake of Solar Cycle 25‎
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|number = 179
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|number = 444
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|first_author = Hugh Hudson
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|first_author = Alexander KOSOVICHEV
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|second_author = and Nicola Omodei
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|publish_date = 13 February 2023
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|publish_date =25 June 2012
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|description = A double whammy: two distinct sunquakes from SOL2022-05-10.
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|description = Coronal disruptions reveal themselves as depletions and gamma-ray emissions
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|image=Icon444.png}}
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|image = Icon179.png}}
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|title = Flare Nimbus
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|title =   Hard X-ray Pulsations via Gaussian Decomposition
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|number = 178
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|number = 443
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|first_author = Susan McKenna-Lawlor
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|first_author = Hannah COLLIER and Laura HAYES
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|second_author =
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|publish_date = 30 January 2023
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|publish_date =14 June 2012
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|description = Flare hard X-ray time variations decomposed objectively
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|description = The Flare Nimbus, its history and significance
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|image=Icon443.png}}
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|image = Icon178.jpg}}
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|title = RHESSI and the Transit of Venus I
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|title =   A possible coronal magnetic flare precursor
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|number = 177
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|number = 442
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|first_author = Hugh Hudson
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|first_author = Enrico LANDI
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|second_author = and Martin Fivian
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|publish_date = 16 January 2023
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|publish_date =1 June 2012
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|description = Novel measurements of the coronal magnetic field may help with flare prediction
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|description = RHESSI prepares for the June 5/6 Venus transit
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|image=Icon442.png}}
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|image = Icon177.jpg}}
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|title = Time Profiles of Solar Flare Densities
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|title =   A slow HOPE with microwave context
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|number = 176
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|number = 441
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|first_author = Ryan Milligan
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|first_author = Hugh HUDSON
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|second_author = and Michael Kennedy
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|publish_date = 12 December 2022
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|publish_date =21 May 2012
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|description = A new microwave facility at Chashan Observatory, and a prototypical HOPE
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|description = Density-diagnostic line ratios in EVE spectra
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|image=Icon441.png}}
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|image = Icon176.png}}
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|title = Solar energetic electron events over one solar cycle
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|title =   Rapid variations of Si IV spectra in a flare observed by IRIS at a sub-second cadence
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|number = 175
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|number = 440
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|first_author = Linghua Wang
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|first_author = Juraj L&Ouml;RIN&#268;&Iacute;K
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|second_author =
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|publish_date = 14 November 2022
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|publish_date =7 May 2012
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|description = Transition-region lines in a flare have a Doppler component revealing quasi-periodic pulsations
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|description = The statistics of SEP electrons
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|image=Icon440.png}}
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|image = Icon175.png}}
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|title = A Shocking Type II
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|title =   A Significant Sudden Ionospheric Disturbance Associated with a Massive Gamma-ray Burst
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|number = 174
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|number = 439
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|first_author = Hazel Bain,
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|first_author = Laura HAYES and Peter GALLAGHER
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|second_author = S&auml;m Krucker and Lyndsay Glesener
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|publish_date = 31 October 2022
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|publish_date =30 April 2012
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|description = A first SID observed in broad daylight, from a source far far away
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|description = The properties of global coronal waves sorted out
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|image=Icon439.png}}
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|image = icon174.png}}
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|title = RHESSI and IRIS
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|title =   Effects of Coronal Structures on the Dynamics of the Global Coronal Wave of SOL2017-09-10‎
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|number = 173
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|number = 438
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|first_author = Hugh Hudson
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|first_author = Huidong HU, Ying D. LIU, and Bei ZHU
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|second_author =
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|publish_date = 17 October 2022
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|publish_date =16 April 2012
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|description = The amazing global coronal wave of SOL2017-09-10 wrapped around the whole Sun, and displayed transmission and reflection at both polar coronal holes
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|description = Flare gold at the foot of the rainbow
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|image=Icon438.png}}
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|image = icon173.png}}
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|title = A New Day Dawns
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|title =   KW-Sun: The Konus-Wind Solar Flare Database in Hard X-Ray and Soft Gamma-Ray Ranges
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|number = 172
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|number = 437
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|first_author = Dale Gary
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|first_author = Alexandra LYSENKO
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|second_author =
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|publish_date = 26 September 2022
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|publish_date =26 March 2012
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|description = An unrivaled hard X-ray and gamma-ray database is entering its third activity maximum
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|description = Soon, true microwave imaging spectroscopy
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|image=Icon437.png}}
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|image = icon172.png}}
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|title = An Fe Cascade
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|title =   First Detection of Kink Oscillations with Solar Orbiter
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|number = 171
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|number = 436
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|first_author = Hugh Hudson
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|first_author = Sihui ZHONG et al.
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|second_author =
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|publish_date = 19 September 2022
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|publish_date =12 March 2012
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|description =  SolO sees coronal oscillations as well as AIA can, and even better
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|description =  Iron everywhere in the EVE spectra
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|image=Icon436.png}}
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|image = icon171.png}}
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|title = Do slow waves trigger pulsations in two-ribbon flares? An observational search‎
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|title =   Energetic Neutral Hydrogen from Large Solar Flares
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|number = 170
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|number = 435
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|first_author = A. Inglis
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|first_author = Glenn MASON
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|second_author = and B. Dennis
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|publish_date = 6 September 2022
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|publish_date = 27 February 2012
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|description =  A rediscovered data treasury reveals the occurrence of many flare/CME events producing solar high-energy neutral atoms
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|description =  Slow waves, QPPs, and hard X-rays
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|image=Icon435.png}}
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|image = icon170.png}}
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|title = RHESSI's Tenth Anniversary
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|title =   Fifty-year Anniversary of the First Detection of Gamma rays from a Solar Flare
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|number = 169
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|number = 434
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|first_author = B. Dennis
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|first_author = Jim Ryan,
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|second_author = and R. Lin
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|second_author = Brian Dennis, and Phil Dunphy
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|publish_date = 15 February 2012
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|publish_date = 8 August 2022
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|description =  On RHESSI's tenth, a top-ten discovery list
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|description =  The rich astrophysics of gamma-ray astronomy began with solar observations fifty years ago
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|image = icon169.png}}
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|image=Icon434.png}}
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|title = Supra-Arcade Downflows
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|title =   Fast Prograde Flows in Solar Active Regions
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|number = 168
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|number = 433
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|first_author = S. Savage
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|first_author = Hugh HUDSON
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|second_author = and D. McKenzie
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|publish_date = 25 July 2022
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|publish_date = 23 January 2012
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|description =  Unexpected, unpredicted, and not modeled yet - weird flows in hot active-region loops
-
|description =  A re-interpretation of the famous SAD tadpoles
+
|image=Icon433.png}}
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|image = icon168.png}}
+
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|title = Flare Observations of the EUV Continua
+
|title =   Undetected Minority-polarity Flux, Moss, and Coronal Heating
-
|number = 167
+
|number = 432
-
|first_author = R. Milligan
+
|first_author = Yi-Ming WANG
-
|second_author =
+
|publish_date = 11 July 2022
-
|publish_date = 16 January 2012
+
|description =  There's plenty of room in "unipolar" active regions for both polarities, and there is good evidence for them
-
|description =  The flare EUV continua now routinely observed
+
|image=Icon432.png}}
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|image = icon167.png}}
+
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|title = No Hard X-rays from Comet Lovejoy
+
|title =   Thermal/Nonthermal with MinXSS and RHESSI
-
|number = 166
+
|number = 431
-
|first_author = H. Hudson
+
|first_author = Shunsaku NAGASAWA
-
|second_author = and P. Saint-Hilaire
+
|publish_date = 13 June 2022
-
|publish_date = 19 December 2011
+
|description =  Time-domain studies of improved X-ray spectra reveal a "super-hot' component
-
|description =  An amazing sungrazing comet, but not detectable at high energies
+
|image=Icon431.png}}
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|image = icon166.png}}
+
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|title = Modelling spatially resolved X-ray polarization
+
|title =   Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021
-
|number = 165
+
|number = 430
-
|first_author = N. Jeffrey
+
|first_author = Yu XU
-
|second_author = and E. Kontar
+
|second_author = and Hui TIAN
-
|publish_date = 12 December 2011
+
|publish_date = 30 May 2022
-
|description =  Spatial distribution of X-ray polarization, and its implications
+
|description =  The observation of the full 3d velocity of a CME, for an anniversary event
-
|image = icon165.png}}
+
|image=Icon430.png}}
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|title = Slowly but surely towards the huge amount of energy II
+
|title =   Carl Størmer
-
|number = 164
+
|number = 429
-
|first_author = S. Ko&#322;oma&#324;ski
+
|first_author = Hugh HUDSON
-
|second_author = and T. Mrozek
+
|second_author = and Lyndsay FLETCHER
-
|publish_date = 28 November 2011
+
|publish_date = 15 April 2022
-
|description =  Analysis of the huge energies of loop-top sources in flares
+
|description =  Størmer and the theory of trapping in loops
-
|image = icon164.png}}
+
|image=Icon429.png}}
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|title = X-ray and H-alpha Flare Impulses
+
|title =   Solar Hard X-rays with Insight
-
|number = 163
+
|number = 428
-
|first_author = K. Radziszewski
+
|first_author = Wei WANG
-
|second_author = and P. Rudawy
+
|second_author = and Ping ZHANG
-
|publish_date = 14 November 2011
+
|publish_date = 21 March 2022
-
|description =  Strikingly precise correlations of H-alpha kernels and hard X-ray bursts
+
|description =  A spectacular limb flare introduces Insight/HXMT, a new observational resource
-
|image = icon163.jpg}}
+
|image=Icon428.png}}
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|title = Slowly but surely towards the huge amount of energy I
+
|title =   Probing chromospheric current sheets using SST and ALMA co-observations
-
|number = 162
+
|number = 427
-
|first_author = Urszula B&#261;k-St&#281;&#347;licka
+
|first_author = Jo&atilde;o da SILVA SANTOS
-
|second_author = and Tomasz Mrozek, Sylwester Ko&#322;oma&#324;ski
+
|publish_date = 21 February 2022
-
|publish_date = 31 October 2011
+
|description =  Emerging magnetic flux appears in ALMA images reflecting coronal current sheets
-
|description =  The energetics of "slow LDEs"
+
|image=Icon427.png}}
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|image = icon162.png}}
+
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|title = Quasi-Periodic Pulsations: Fermi/GBM Results
+
|title =   A demonstration of STIX hard X-ray imaging spectroscopy capabilities for an X-class flare (SOL2021-10-28)
-
|number = 161
+
|number = 426
-
|first_author = David Gruber
+
|first_author = Andrea BATTAGLIA, Hannah COLLIER,
-
|second_author = and Pawel Lachowicz
+
|second_author = and S&auml;m KRUCKER
-
|publish_date = 24 October 2011
+
|publish_date = 7 February 2022
-
|description =  Dealing with red noise
+
|description =  STIX imaging of an X-class flare marks its success
-
|image = icon161.png}}
+
|image=Icon426.png}}
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|title = A Flare in 3D
+
|title =   A solar flare driven by thermal conduction observed in mid-infrared
-
|number = 160
+
|number = 425
-
|first_author = Hugh Hudson
+
|first_author = Guillermo GIM&Eacute;NEZ de CASTRO
-
|second_author = and Juan Carlos Martinez Oliveros
+
|publish_date = 24 January 2022
-
|publish_date = 10 October 2011
+
|description =  Strong 10-micron emission from a GOES C2 flare suggests conductive heating
-
|description =  Solar astrometry in 3D
+
|image=Icon425.png}}
-
|image = icon160.gif}}
+
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|title = Solar Max Arrives
+
|title =   Disk Occultation of a Lopsided Sun‎
-
|number = 159
+
|number = 424
-
|first_author = Hugh Hudson
+
|first_author = Hugh HUDSON,
-
|second_author = and Richard Schwartz
+
|second_author = Stephen WHITE and S&auml;m KRUCKER
-
|publish_date = 28 September 2011
+
|publish_date = 10 January 2022
-
|description =  Seven X-class flares already in 2011
+
|description =  Observing a spotless Sun can enable observations of the faint corona.
-
|image = icon159.png}}
+
|image=Icon424.png}}
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|title = Two-stage SEE Shows Reconnection
+
|title =   Resolving two distinct thermal X-ray components in a compound solar flare
-
|number = 158
+
|number = 423
-
|first_author = Yang Su
+
|first_author = Zhenjun ZHOU
-
|second_author = and Brian Dennis
+
|second_author = and Rui LIU
-
|publish_date = 8 September 2011
+
|publish_date = 28 December 2021
-
|description =  Reconnection late in a flare
+
|description =  Superhot coronal sources may be independent loop systems
-
|image = icon158.png}}
+
|image=Icon423.png}}
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|title = Scattered Light: Inverse Compton Scattering and Coronal Hard X-ray Sources
+
|title =   Bridging solar flares to coronal mass ejections
-
|number = 157
+
|number = 422
-
|first_author = B. Chen
+
|first_author = Markus ASCHWANDEN
-
|second_author = and T. S. Bastian
+
|publish_date = 14 December 2021
-
|publish_date = 17 August 2011
+
|description =  The Neupert effect allows us to trace coronal mass ejections seamlessly
-
|description =  Inverse Compton radiation - gaining momentum
+
|image=Icon422.png}}
-
|image = icon157.png}}
+
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|title = X-ray, EUV & WL emission heights observed by RHESSI & SDO
+
|title =   The Jakimiec Diagnostic Diagram
-
|number = 156
+
|number = 421
-
|first_author = Marina Battaglia
+
|first_author = Hugh HUDSON
-
|second_author = and Eduard Kontar
+
|publish_date = 29 November 2021
-
|publish_date = 24 July 2011
+
|description =  The joint variation of GOES temperature and emission measure discloses new features via an old tool
-
|description =  A first - the relative height of hard X-ray and white-light flare sources
+
|image=Icon421.png}}
-
|image = icon156.png}}
+
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|title = Hard X-rays and Sympathy
+
|title =   First look at ALMA/HInode/IRIS microflares
-
|number = 155
+
|number = 420
-
|first_author = Hugh Hudson
+
|first_author = Toshifumi SHIMIZU
-
|second_author =  
+
|second_author = et al.
-
|publish_date = 13 July 2011
+
|publish_date = 8 November 2021
-
|description =  A hard X-ray spike elicits a sympathetic response
+
|description =  High-resolution ALMA and multiwavelength observations of microflaring
-
|image = icon155.png}}
+
|image=Icon420.png}}
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|title = Suzaku Microflares
+
|title =   Thomson scattering near sunspots
-
|number = 154
+
|number = 419
-
|first_author = S. Ishikawa
+
|first_author = Pascal Saint-Hilaire
-
|second_author =  
+
|second_author = et al.
-
|publish_date = 30 June 2011
+
|publish_date =  25 October 2021
-
|description =  Microflares too have powerful particle acceleration
+
|description =  Completing the modeling of low-coronal Thomson polarimetry
-
|image = icon154.png}}
+
|image=Icon419.png}}
 +
 
 +
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|title =  A Non-PFSS Global Coronal Model
 +
|number = 418
 +
|first_author = Oliver RICE
 +
|second_author = and Anthony YEATES
 +
|publish_date = 11 October 2021
 +
|description =  Modeling as convenient as PFSS but much more realistic
 +
|image=Icon418.png}}
 +
 
 +
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|title =  Manifold Nonthermality
 +
|number = 417
 +
|first_author = Marina BATTAGLIA
 +
|second_author = et al.
 +
|publish_date =  27 September 2021
 +
|description =  Even weak flares involve multiple sites of non thermal activity
 +
|image=Icon417.png}}
 +
 
 +
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|title =  X-Rays from a Type I Radio Burst
 +
|number = 416
 +
|first_author = R.  RAMESH
 +
|publish_date =  20 September 2021
 +
|description =  A first identification of type I radio emission with hot plasma
 +
|image=Icon416.png}}
 +
 
 +
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 +
|title =  Do Hot Onsets Predict Flare Magnitudes?
 +
|number = 415
 +
|first_author = Hugh HUDSON
 +
|publish_date =  30 August 2021
 +
|description =  Maybe we can tell how big a flare is going to be from its initial development...
 +
|image=Icon415.png}}
 +
 
 +
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|title =  Confined or Eruptive?
 +
|number = 414
 +
|first_author = Ting LI et al.
 +
|publish_date =  16 August 2021
 +
|description =  Increased magnetic flux reduces CME eruptivity
 +
|image=Icon414.png}}
 +
 
 +
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 +
|title =  Impulsive and Gradual Eruptive Gamma Flares and Associated CMEs
 +
|number = 413
 +
|first_author = Alexey STRUMINSKY,
 +
|second_author = Irina GRIGORIEVA and Andrei SADOVSKI
 +
|publish_date =  19 July 2021
 +
|description =  Extreme behavior of flare/CME events explained by environment
 +
|image=Icon373.png}}
 +
 
 +
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 +
|title =  The Morphology of Flare Time Profiles
 +
|number = 412
 +
|first_author = Larisa KASHAPOVA
 +
|second_author = et al.
 +
|publish_date =  12 July 2021
 +
|description =  Systematic comparison of solar and stellar flaring time profiles
 +
|image=Icon412.png}}
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|title = Acceleration without Heating
+
|title =   Flare Pulsation and the Heliosphere
-
|number = 153
+
|number = 411
-
|first_author = G. Fleishman &
+
|first_author = Brendan CLARKE
-
|second_author = E. Kontar
+
|second_author = et al.
-
|publish_date = 13 June 2011
+
|publish_date = 5 July 2021
-
|description =  Strong hard X-rays and weak soft X-rays - breaking the paradigm?
+
|description =  Flare pulsations link closely to the distant heliosphere
-
|image = icon153.png}}
+
|image=Icon411.png}}
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|title = DIY spectroscopy: Analyzing AIA diffraction patterns
+
|title =   STIX, the Hard X-Ray Telescope on board Solar Orbiter
-
|number = 152
+
|number = 410
-
|first_author = C. L. Raftery &
+
|first_author = Andrea Francesco BATTAGLIA
-
|second_author = S. Krucker
+
|second_author = and S&auml;m KRUCKER
-
|publish_date = 30 May 2011
+
|publish_date = 28 June 2021
-
|description =  Imaging spectroscopy in the EUV, at AIA resolution
+
|description =  STIX is operational and producing great data
-
|image = icon152.png}}
+
|image=Icon410.png}}
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|title = EVE/ESP and the Neupert Effect
+
|title =   Nonequilibrium Ionization of Flare Plasma Observed by Hinode/EIS
-
|number = 151
+
|number = 409
-
|first_author = H. Hudson
+
|first_author = Shinsuke IMADA
|second_author =  
|second_author =  
-
|publish_date = 9 May 2011
+
|publish_date = 14 June 2021
-
|description =  The Neupert Effect works, sort of, in a limb gamma-ray flare
+
|description =  Evidence for non-equilibrium ionization in the current sheet of SOL2017-09-10
-
|image = icon151.png}}
+
|image=Icon409.png}}
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|title = Decimetric pulsations and coronal X-ray sources
+
|title =   Effects of Flares on Solar p-modes
-
|number = 150
+
|number = 408
-
|first_author = A. Benz,
+
|first_author = Maria-Cristina RABELLO SOARES
-
|second_author = M. Battaglia, and N. Vilmer
+
|second_author = and Frederic BAUDIN
-
|publish_date = 18 April 2011
+
|publish_date = 26 April 2021
-
|description =  Radio pulsations may illuminate a strongly non-radial current sheet
+
|description =  No detectable p-mode amplitude changes due to solar flares
-
|image = icon150.png}}
+
|image=Icon408.png}}
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|title = The Alfven Speed above a Sunspot, and Gamma-rays
+
|title =   Subsecond Spikes in Solar Flare X-ray Flux as Seen by Fermi GBM
-
|number = 149
+
|number = 407
-
|first_author = H. Hudson
+
|first_author =Trevor KNUTH
-
|second_author = and L. Fletcher
+
|second_author = and Lindsay GLESENER
-
|publish_date = 12 April 2011
+
|publish_date = 19 April 2021
-
|description =  Flare effects in sunspot umbrae
+
|description =  A new analysis technique pushes hard X-ray time scales to 0.1 sec or faster
-
|image = icon149.png}}
+
|image=Icon407.png}}
-
{{{Nugget Badge
+
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|title = Slow Magnetoacoustic Waves in Two-Ribbon Flares
+
|title = Negative He 10830 Flare Ribbons and Non-thermal Electrons
-
|number = 148
+
|number = 406
-
|first_author = V. Nakariakov
+
|first_author = Graham KERR
-
|second_author = and I. Zimovets
+
|second_author =
-
|publish_date = 17 March 2011
+
|publish_date =  12 April 2021
-
|description =  Wave dynamics explains arcade development
+
|description =  A 1D radiation hydrodynamics model can explain the dark leading edges of He I flare ribbons
-
|image = icon148.png}}
+
|image=Icon406.png}}
 +
 
 +
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 +
|title =  Tracing the sources of gradual solar energetic particle events
 +
|number = 405
 +
|first_author = David H. BROOKS
 +
|second_author = and Stephanie L. YARDLEY
 +
|publish_date = 29 March 2021
 +
|description =  Chemical abundances in SEPs suggest an origin in flare-related moss regions
 +
|image=Icon405.png}}
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|title = First Sunquake of Solar Cycle 24 Observed by Solar Dynamics Observatory
+
|title = The Superflare SOL2017-09-06: from submm to mid-IR
-
|number = 147
+
|number = 404
-
|first_author = A. G. Kosovichev
+
|first_author = Guillermo (Guigue) GIM&Eacute;NEZ DE CASTRO
|second_author =  
|second_author =  
-
|publish_date = 7 March 2011
+
|publish_date = 15 March 2021
-
|description =  An X-class flare - and a sunquake
+
|description =  Glimpsing the "missing decades" of the flare emission spectrum
-
|image = icon147.png}}
+
|image=Icon404.png}}
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|title = M is for Magnifique Part Deux
+
|title = The Neupert Effect Revisited
-
|number = 146
+
|number = 403
-
|first_author = Steven Christe
+
|first_author = Jiong QIU
-
|second_author = and Andrew Inglis
+
|second_author =  
-
|publish_date = 22 February 2011
+
|publish_date = 8 March 2021
-
|description =  A type II radio burst but no CME and introducing a new way to search for waves in SDO. (CORRECTION There is a CME!)
+
|description =  Two time scales for heating individual flare strands
-
|image = icon146.png}}
+
|image=Icon403.png}}
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|title = At last, the EUV Spectrum
+
|title = FLUKA as a tool for interpreting flare gamma-rays
-
|number = 145
+
|number = 402
-
|first_author = Hugh Hudson
+
|first_author = Alec MACKINNON
|second_author =  
|second_author =  
-
|publish_date = 8 February 2011
+
|publish_date = 1 March 2021
-
|description =  The main flare radiated energy is not in the EUV
+
|description =  The nuclear physics of solar flares captured in a detailed model
-
|image = icon145.png}}
+
|image=Icon402.png}}
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|title = Black and White Flares
+
|title = A Collective Study of 11 NuSTAR Microflares
-
|number = 144
+
|number = 401
-
|first_author = Juan Carlos Martinez Oliveros
+
|first_author = Jessie DUNCAN and
-
|second_author = and Charles Lindsey
+
|second_author = Lindsay GLESENER
-
|publish_date = 24 January 2011
+
|publish_date =  22 February 2021
-
|description =  HMI sees a black-light flare (?)
+
|description =  Swarms of NuSTAR micro flares
-
|image = icon144.png}}
+
|image=Icon401.png}}
 +
 
 +
{{{{Nugget Badge
 +
|title =  A Solar FRB
 +
|number = 400
 +
|first_author = Dale GARY and
 +
|second_author = Hugh HUDSON
 +
|publish_date = 15 February 2021
 +
|description =  A new frontier in the solar time domain
 +
|image=Icon400.png}}
{{Nugget Badge
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|title = The Flares of the RHESSI Monograph
+
|title = Richard Schwartz
-
|number = 143
+
|number = 399
-
|first_author = Hugh Hudson
+
|first_author = Brian DENNIS and
-
|second_author = and Gordon Emslie
+
|second_author = Hugh HUDSON
-
|publish_date = 11 January 2011
+
|publish_date = 25 January 2021
-
|description =  The top ten RHESSI flares thus far
+
|description =  Remembering a friend and colleague
-
|image = icon143.png}}
+
|image=Icon399.jpg}}
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|title = Brilliant Timing
+
|title = Observing Solar Flare X-ray Polarization with Prospective CubeSat Missions
-
|number = 142
+
|number = 398
-
|first_author = S&auml;m Krucker
+
|first_author = Natasha JEFFREY
-
|second_author = and Hugh Hudson
+
|publish_date = 4 January 2021
-
|publish_date = 20 December 2010
+
|description =  The polarization of the solar X-ray spectrum generally remains to be observed
-
|description =  Hinode and RHESSI observations strain the credibility of the thick-target model
+
|image=Icon398.png}}
-
|image = icon142.png}}
+
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|title = M is for Magnifique
+
|title = Solar effects in the local interstellar medium
-
|number = 141
+
|number = 397
-
|first_author = Steven Christe
+
|first_author = Don GURNETT and
-
|second_author = and Andrew Inglis
+
|second_author = Hugh HUDSON
-
|publish_date = 6 December 2010
+
|publish_date = 14 December 2020
-
|description =  RHESSI and SDO see a remarkable flare
+
|description =  Relativistic particle events observed _in situ_ in the interstellar medium
-
|image = icon141.png}}
+
|image=Icon397.png}}
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|title = Major Flare Watch Evaluation
+
|title = Investigation of Small-Scale Energy Releases in Hard X-rays with ​FOXSI
-
|number = 140
+
|number = 396
-
|first_author = Dick Canfield
+
|first_author = Subramania ATHIRAY and
-
|second_author = and Shaun Bloomfield
+
|second_author = Juliana VIEVERING
-
|publish_date = 15 November 2010
+
|publish_date = 7 December 2020
-
|description =  How well the Chief Observers do
+
|description =  Hard X-rays and high temperatures from the feeblest microflares
-
|image = icon140.png}}
+
|image=Icon396.png}}
{{Nugget Badge
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|title = But there was a bigger one
+
|title = What drives impulsive coronal heating?
-
|number = 139
+
|number = 395
-
|first_author = Hugh Hudson
+
|first_author = Pradeep CHITTA
-
|second_author = and Lindsay Glesener
+
|second_author = et al.
-
|publish_date = 8 November 2010
+
|publish_date = 30 November 2020
-
|description =  A cycle 24 coronal hard X-ray event
+
|description =  Impulsive footpoint emissions suggest magnetic reconnection in the chromosphere
-
|image = icon139.jpg}}
+
|image=Icon395.png}}
{{Nugget Badge
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|title = SDO EVE Flare Observation
+
|title = Probing the solar coronal heating function with slow magnetoacoustic waves
-
|number = 138
+
|number = 394
-
|first_author = Phil Chamberlin
+
|first_author = Dmitrii KOLOTKOV
-
|second_author = and Tom Woods
+
|second_author = et al.
-
|publish_date = 18 October 2010
+
|publish_date = 16 November 2020
-
|description =  Introducing EVE spectroscopy of flares
+
|description =  Coronal heating models meet damped slow magnetoacoustic waves
-
|image = icon138.jpg}}
+
|image=Icon394.png}}
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|title = Sector Boundaries and RHESSI Flares
+
|title = Self-Consistent Flare Model
-
|number = 137
+
|number = 393
-
|first_author = Leif Svalgaard
+
|first_author = Wenzhi RUAN
-
|second_author = and Iain Hannah
+
|second_author = and Rony KEPPENS
-
|publish_date = 4 October 2010
+
|publish_date = 2 November 2020
-
|description =  The interplanetary magnetic sectors seen in RHESSI flare statistics
+
|description =  Energy transport by fast particles made self-consistent with MHD flare modeling
-
|image = icon137.jpg}}
+
|image=Icon393.png}}
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|title = Quiet Sun III
+
|title = Hot Flare Onsets
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|number = 136
+
|number = 392
-
|first_author = Iain Hannah
+
|first_author = Hugh HUDSON
-
|second_author = and Hugh Hudson
+
|second_author = et al.
-
|publish_date = 27 September 2010
+
|publish_date = 26 October 2020
-
|description =  The quiet Sun can be an X-ray source
+
|description =  The initial soft X-ray temperatures of solar flares tend to be in the 10-15 MK range
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|image = icon136.jpg}}
+
|image=Icon392.png}}
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|title = The X-ray Limb
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|title = Electric Current Neutralization and Eruption
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|number = 135
+
|number = 391
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|first_author = Hugh Hudson
+
|first_author = Ellis AVALLONE
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|second_author = and Gordon Hurford
+
|second_author = and Xudong SUN
-
|publish_date = 6 September 2010
+
|publish_date = 19 October 2020
-
|description =  RHESSI gets to determine R<sub>Sun</sub>
+
|description =  Coronal currents without neutralizing return currents appear to  
-
|image = icon135.jpg}}
+
|image=Icon391.png}}
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|title = Fast electrons relaxing
+
|title = Prediction of Solar Cycle 25
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|number = 134
+
|number = 390
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|first_author = Alec MacKinnon
+
|first_author = Leif SVALGAARD
|second_author =  
|second_author =  
-
|publish_date = 23 August 2010
+
|publish_date = 5 October 2020
-
|description =  What do electrons do to relax?
+
|description =  Now we know how big the next solar maximum will be
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|image = icon134.jpg}}
+
|image=Icon390.png}}
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|title = Chromospheric Plasma Parameters
+
|title =   Flare/CME Cartoon Archive
-
|number = 133
+
|number = 389
-
|first_author = Stephanie Chow and
+
|first_author = Hugh HUDSON
-
|second_author = Hugh Hudson
+
|second_author =  
-
|publish_date = 2 August 2010
+
|publish_date = 27 September 2020
-
|description =  Semi-empirical models of the chromosphere and plasma physics
+
|description =  A new edition of the Flare/CME archive, nearly a half kilotoon now
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|image = icon133.jpg}}
+
|image=Icon389.png}}
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|title = Harmonic Oscillations
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|title =   Submerged Flare Acoustic Sources
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|number = 132
+
|number = 388
-
|first_author = Ivan Zimovets and
+
|first_author = Juan Camilo BUITRAGO CASAS
-
|second_author = Andrew Inglis
+
|second_author = and Angel MART&Iacute;NEZ
-
|publish_date = 12 July 2010
+
|publish_date = 13 September 2020
-
|description =  RHESSI rotation and nutation are necessary, but may complicate time-series analysis
+
|description =  Flare acoustic radiation emanates from a source _inside_ the Sun
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|image = icon132.jpg}}
+
|image=Icon388.png}}
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|title = Cloudy SolarSoftware
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|title =   Circular Ribbon Flare at Microwaves
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|number = 131
+
|number = 387
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|first_author = Laszlo Etesi and
+
|first_author = Jeongwoo LEE
-
|second_author = Brian Dennis
+
|second_author =  
-
|publish_date = 5 July 2010
+
|publish_date = 31 August 2020
-
|description =  The Cloud helps with access to data in the Virtual Solar Observatory
+
|description =  Breakout reconnection reveals itself via microwave polarization measurements.
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|image = icon131.jpg}}
+
|image=Icon387.png}}
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|title = Albedo and the modification of RHESSI results
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|title =   Relation of Non-neutralized electric currents and the activity in active regions
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|number = 130
+
|number = 386
-
|first_author = Natasha Jeffrey and
+
|first_author = P. VEMAREDDY
-
|second_author = Eduard Kontar
+
|second_author =  
-
|publish_date = 28 June 2010
+
|publish_date = 24 August 2020
-
|description =  Compton-scattering albedo sources have significant observational consequences
+
|description =  Non-neutralized coronal current systems contribute to CME eruptions
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|image = icon130.jpg}}
+
|image=Icon386.png}}
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|title = Kernels and Ribbons
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|title =   White-light emission and photospheric magnetic field changes in flares
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|number = 129
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|number = 385
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|first_author = Jiong QIU
+
|first_author = J. Sebasti&aacute;n CASTELLANOS DUR&Aacute;N
-
|second_author =  
+
|second_author = and Lucia KLEINT
-
|publish_date = 14 June 2010
+
|publish_date = 17 August 2020
-
|description = A clue to the differences between footpoints and ribbons
+
|description = There are strong correlations between white-light flare emissions and line-of-sight magnetic field changes
-
|image = icon129.jpg}}
+
|image=Icon385.png}}
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|title = Awesome Stellar Flare Spectra
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|title =   Sunspot Differential Rotation in an X-class Flare
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|number = 128
+
|number = 384
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|first_author = Adam Kowalski and
+
|first_author = Richard GRIMES,
-
|second_author = Suzanne Hawley
+
|second_author = Bal&aacute;zs PINT&Eacute;R and Huw MORGAN
-
|publish_date = 2 June 2010
+
|publish_date = 10 August 2020
-
|description = Can spectra of stellar flares be compared with images of solar flares?
+
|description = Observations suggesting how the coronal tail can wag the photospheric dog
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|image = icon128.jpg}}
+
|image=Icon384.png}}
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|title = RHESSI's Anneal Adventure
+
|title =   Energy Partitioning in a Nonthermally Dominated Two-loop Solar Flare
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|number = 127
+
|number = 383
-
|first_author = David Smith and
+
|first_author = Galina MOTORINA
-
|second_author = Mark Lewis
+
|second_author = et al.
-
|publish_date = 14 May 2010
+
|publish_date = 3 August 2020
-
|description = An operations anomaly leads to very successful improvements in RHESSI's performance
+
|description = Modeling the propagation of energy via GX Simulator in an early-impulsive flare
-
|image = icon127.jpg}}
+
|image=Icon383.png}}
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|title = History of Solar Oblateness
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|title =   SOL2013-11-10 Eruptive Circular-ribbon Flare with Extended Remote Brightenings
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|number = 126
+
|number = 382
-
|first_author = Hugh Hudson and
+
|first_author = Chang LIU
-
|second_author = Jean-Pierre Rozelot
+
|second_author = et al.
-
|publish_date = 26 April 2010
+
|publish_date = 31 July 2020
-
|description = RHESSI is contributing to an historically interesting and fundamental measurement
+
|description = A circular-ribbon event can launch an eruption by breaking through its separatrix dome
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|image = icon126.jpg}}
+
|image=Icon382.png}}
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|title = An Alternative View of the Masuda Flare
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|title =   Extreme-Ultraviolet Late Phase of Solar Flares
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|number = 125
+
|number = 381
-
|first_author = Nariaki Nitta
+
|first_author = Rui LIU
-
|publish_date = 12 April 2010
+
|second_author =
-
|description = Large-scale coronal structures may have played a major role in the Masuda flare
+
|publish_date = 22 June 2020
-
|image = icon125.jpg}}
+
|description = Both arcade and circular-ribbon flares may sometimes spawn EUV late phase emission
 +
|image=Icon381.png}}
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|title = Particle Acceleration due to a Plasmoid-Looptop Collision
+
|title =   Energy transport by accelerated particles in the quiet solar atmosphere
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|number = 124
+
|number = 380
-
|first_author = Ryan Milligan
+
|first_author = Lars FROGNER,
-
|second_author =  
+
|second_author = Boris GUDIKSEN and Helle BAKKE
-
|publish_date = 29 March 2010
+
|publish_date = 15 June 2020
-
|description = Evidence that downward plasma motions during a flare result in particle acceleration
+
|description = A first study of non-thermal particles integrated into an MHD simulation of the solar atmosphere
-
|image = icon124.jpg}}
+
|image=Icon380.png}}
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|title = Waiting Times of Solar Hard X-Ray Flares
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|title =   Quasi-periodic pulsations as indicators of oscillatory processes in solar flares
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|number = 123
+
|number = 379
-
|first_author = Markus Aschwanden and
+
|first_author = Elena KUPRIYANOVA
-
|second_author = Jim McTiernan
+
|second_author = et al.
-
|publish_date = 15 March 2010
+
|publish_date = 11 May 2020
-
|description = Waiting times, sandpiles, and solar flares
+
|description = Many, many QPPs
-
|image = icon123.jpg}}
+
|image=Icon379.png}}
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|title = Narrowband radio signal correlated with early hard X-ray flux during a microflare
+
|title =   Rejuvenating Solar Flare Termination Shocks as Particle Accelerators
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|number = 122
+
|number = 378
-
|first_author = Henry Aurass
+
|first_author = Bin CHEN
|second_author =  
|second_author =  
-
|publish_date = 1 March 2010
+
|publish_date = 4 May 2020
-
|description = RHESSI hard X-ray bursts with orthogonal radio signatures
+
|description = At last, clear evidence for a long-predicted phenomenon
-
|image = icon122.jpg}}
+
|image=Icon378.png}}
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|title = Revisiting the SHH and SEP Link
+
|title =   Broad symmetrical Doppler-shifted Fe XXI line profiles
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|number = 121
+
|number = 377
-
|first_author = James Grayson
+
|first_author = Vanessa POLITO
-
|second_author = and S&auml;m Krucker
+
|second_author =  
-
|publish_date = 15 February 2010
+
|publish_date = 20 April 2020
-
|description = RHESSI confirms the statistical link between flare hard X-ray spectral evolution and the acceleration of solar energetic particles
+
|description = It is difficult to explain "evaporation" line profiles by superposition of unresolved flows
-
|image = icon121.jpg}}
+
|image=Icon377.png}}
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|title = Two phases of X-ray emission in a solar eruptive flare
+
|title =   Phenomena in the unusually long pre-impulsive phase of SOL2011-06-07
-
|number = 120
+
|number = 376
-
|first_author = Bhuwan Joshi
+
|first_author = Marian KARLICK&Yacute;,
-
|second_author =  
+
|second_author = Jana KA&Scaron;PAROV&Aacute;, and Robert SYCH
-
|publish_date = 1 February 2010
+
|publish_date = 13 April 2020
-
|description = Can the RHESSI early phase of a flare be squeezed into the Rainbow Reconnection Model?
+
|description = A massive and slowly-rising filament eruption reveals important new signatures of the physics
-
|image = icon120.jpg}}
+
|image=Icon376.png}}
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|title = Solar Hard X-ray Albedo
+
|title =   Evidence for a Coronal Shock Wave Origin for Relativistic Protons Producing Solar Gamma-Rays and Observed by Neutron Monitors at Earth‎
-
|number = 119
+
|number = 375
-
|first_author = Ed Schmahl
+
|first_author = Athanasios KOULOUMVAKOS
-
|second_author = and Gordon Hurford
+
|second_author = and Gerry SHARE
-
|publish_date = 18 January 2010
+
|publish_date = 6 April 2020
-
|description = The elusive hard X-ray albedo source directly imaged at last!
+
|description = Successful modeling of prolonged solar gamma-ray emissions and terrestrial ground-level cosmic-ray events
-
|image = icon119.jpg}}
+
|image=Icon375.png}}
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|title = Cycle 24 has begun
+
|title =   Using overlappogram data to find hot flare plasma
-
|number = 118
+
|number = 374
-
|first_author = Hugh Hudson
+
|first_author = Louise HARRA
-
|second_author = and Greg Slater
+
|  
-
|publish_date = 5 January 2010
+
|publish_date = 23 March 2020
-
|description = Activity has increased sufficiently to state that we have left the doldrums at last.
+
|description = Imaging Fe XXIV at high resolution with the EIS slot data
-
|image = icon118.jpg}}
+
|image=Icon374.png}}
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|title = Relative and (maybe) Absolute RHESSI Detector Efficiency: 2002-2008
+
|title =   SOL2017-09-04 (M5.5) 2017 as a Source of Relativistic Electrons and Protons
-
|number = 117
+
|number = 373
-
|first_author = Jim McTiernan
+
|first_author = Alexei STRUMINSKII
-
|second_author =
+
| (see text)
-
|publish_date = 22 December 2009
+
|publish_date = 16 March 2020
-
|description = The thousands of flares observed by RHESSI are used to intercalibrate its nine detectors, and we also use the standard GOES soft X-ray data as an external reference
+
|description = Flare-accelerated particles, rather than SEPs, energize sustained gamma-ray emission
-
|image = icon117.jpg}}
+
|image=Icon373.png}}
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|title = A tiny white-light flare‎
+
|title =   Heating of the solar photosphere during a white-light flare‎
-
|number = 116
+
|number = 372
-
|first_author = Hugh Hudson
+
|first_author = Jan JURČÁK
-
|second_author =
+
| (see text)
-
|publish_date = 7 December 2009
+
|publish_date = 2 March 2020
-
|description = A faint white-light flare serves as a model for the continuous energy distribution of the impulsive phase
+
|description = The best-ever spectrum of the flare photosphere
-
|image = icon116.jpg}}
+
|image=Icon372.png}}
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|title = Dips and Waves
+
|title =   A Hot Cusp-Shaped Confined Solar Flare
-
|number = 115
+
|number = 371
-
|first_author = Iain Hannah
+
|first_author = Aaron HERNANDEZ-PEREZ
-
|second_author = and Eduard Kontar
+
|publish_date = 24 February 2020
-
|publish_date = 23 November 2009
+
|description = A flare may have a prominent hot cusp with the help of any eruption
-
|description = The inclusion of wave-particle interactions appears to have a drastic effect on the classical thick-target model for flare hard X-ray emission.
+
|image=Icon371.png}}
-
|image = icon115.jpg}}
+
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|title = STEREO observations of flares and their associations with CMEs
+
|title =   The Temporal and Spatial Extension of Gamma-ray Emission from the Sun
-
|number = 114
+
|number = 370
-
|first_author = Nariaki Nitta
+
|first_author = Nat GOPALSWAMY
-
|second_author =
+
|publish_date = 17 February 2020
-
|publish_date = 10 November 2009
+
|description = Sustained solar &gamma;-rays and solar cosmic rays
-
|description = Is it possible to distinguish flares associated with major CMEs from those not associated with them, on the basis of hard X-ray images?
+
|image=Icon370.ng.png}}
-
|image = icon114.jpg}}
+
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|title = Imaging through visibility interpolation: uv-smooth
+
|title =   A PSP Perihelion
-
|number = 113
+
|number = 369
-
|first_author = A. M. Massone,
+
|first_author = Jessie DUNCAN
-
|second_author = M. Piana and A. G. Emslie
+
|second_author = and Hugh Hudson
-
|publish_date = 23 October 2009
+
|publish_date = 20 January 2020
-
|description = RHESSI visibilities allow incredibly fast and robust imaging of solar flares. Read this nugget and you'll learn how.
+
|description = The Parker Solar Probe enters its fourth perihelion already. Now
-
|image = icon113.jpg}}
+
|image=Icon369.png}}
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|title = A Bad Time for Flares but a Good Time for Debris
+
|title =   Remembering John Brown
-
|number = 112
+
|number = 368
-
|first_author = W. Dean Pesnell
+
|first_author = Alec MacKINNON
|second_author =  
|second_author =  
-
|publish_date = 12 October 2009
+
|publish_date = 13 January 2020
-
|description = Orbital debris - dangerous to satellites in low Earth orbit - has been increasing recently. There are solar and non-solar reasons for this.
+
|description = John passed away unexpectedly on 16 November 2019
-
|image = icon112.jpg}}
+
|image=Icon368.png}}
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|title = RHESSI Deep Integrations
+
|title =   A Global Survey of EUV Coronal Power Spectra
-
|number = 111
+
|number = 367
-
|first_author = Pascal Saint-Hilaire
+
|first_author = Karl Battams
|second_author =  
|second_author =  
-
|publish_date = 29 September 2009
+
|publish_date = 30 December 2019
-
|description = With an extremely deep integration, RHESSI may have detected X-rays from the base of a post-CME current sheet.
+
|description = Time-series parameter maps of imaged power spectra from an AIA pipeline
-
|image = icon111.jpg}}
+
|image=Icon367.png}}
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|title = RHESSI in Cycle 24
+
|title =   Cosmic Rays over the Rainbow Bridge
-
|number = 110
+
|number = 366
-
|first_author = S&auml;m Krucker
+
|first_author = Hugh Hudson
-
|second_author = and Hugh Hudson
+
|second_author = Alec MacKinnon
-
|publish_date = 14 September 2009
+
|publish_date = 16 December 2019
-
|description = RHESSI has successfully imaged one of the first flares of Cycle 24 in hard X-rays
+
|description = Cosmic rays approach the Sun
-
|image = icon110.jpg}}
+
|image=Icon366.png}}
{{Nugget Badge
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|title = Confined Flares versus Eruptive Flares
+
|title =   Spectropolarimetric Insight into Plasma-Sheet Dynamics of a Solar Flare
-
|number = 109
+
|number = 365
-
|first_author = Jie Zhang
+
|first_author = Ryan French
|second_author =  
|second_author =  
-
|publish_date = 31 August 2009
+
|publish_date = 9 December 2019
-
|description = Eruptions tend not to happen for events that occur deep within an active region
+
|description = CoMP polarization patterns in SOL2017-09-10 are amazing
-
|image = icon109.jpg}}
+
|image=Icon365.png}}
{{Nugget Badge
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|title = Solar Cosmic Rays of the GLE on 20 January 2005
+
|title =   Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares‎
-
|number = 108
+
|number = 364
-
|first_author = Sophie Masson
+
|first_author = Ranadeep Sarkar,
-
|second_author = & Ludwig Klein
+
|second_author = Nandita Srivastava and Astrid Veronig
-
|publish_date = 24 August 2009
+
|publish_date = 18 November  2019
-
|description = The relativistic solar protons of this event are related to an extended impulsive phase in the low corona
+
|description = The net Lorentz force clearly exhibits a build-up and release pattern
-
|image = icon108.jpg}}
+
|image=Icon364.png}}
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|title = CMEless Flares
+
|title =   Flare waiting times depend on their magnitudes
-
|number = 107
+
|number = 363
|first_author = Hugh Hudson
|first_author = Hugh Hudson
-
|second_author = & S&auml;m Krucker
+
|second_author =  
-
|publish_date = 12 August 2009
+
|publish_date = 11 November  2019
-
|description = Major flares without CMEs have distinguishing X-ray properties
+
|description = Surprising new evidence for the flare build-up and release process
-
|image = icon107.jpg}}
+
|image=Icon363.png}}
{{Nugget Badge
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|title = Where are the flares
+
|title =   Can magnetic reconnection cause solar rainstorms?‎
-
|number = 106
+
|number = 362
-
|first_author = Hugh Hudson
+
|first_author = Petra Kohutova
-
|second_author = & Leif Svalgaard
+
|second_author =  
-
|publish_date = 21 July 2009
+
|publish_date = 4 November  2019
-
|description = The rise to maximum of Cycle 24 is much weaker, in terms of flare occurrence, than Cycle 23.
+
|description = Impulsive coronal heating resulting from reconnection can trigger coronal rain
-
|image = icon106.jpg}}
+
|image=Icon362.png}}
{{Nugget Badge
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|title = The 15.11 MeV Gamma-ray Line Detected?
+
|title = Non-radial jets on the edges of active regions
-
|number = 105
+
|number = 361
-
|first_author = Brian Dennis
+
|first_author = Peter Wyper
|second_author =  
|second_author =  
-
|publish_date = 6 July 2009
+
|publish_date = 14 October 2019
-
|description = Carol Crannell's favorite gamma-ray line may have been detected at last
+
|description = The very common jet structures we see can naturally combine twist and breakout
-
|image = icon105.jpg
+
|image=Icon361.png}}
-
}}
+
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|title = Do solar decimetric spikes originate in coronal X-ray sources?
+
|title = Searching SOLfully within the Nuggets
-
|number = 104
+
|number = 360
-
|first_author = Arnold Benz &
+
|first_author = Hugh Hudson
-
|second_author = Marina Battaglia
+
|second_author =  
-
|publish_date = 22 June 2009
+
|publish_date = 7 October 2019
-
|description = A surprise: radio and hard X-ray positions do not agree
+
|description = The IAU target identifier works well for finding items about a particular event
-
|image = icon104.jpg
+
|image=Icon360.png}}
-
}}
+
{{Nugget Badge
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|title = STEREO observed stealth CME
+
|title = Submillimeter Radiation as the Thermal Component of the Neupert Effect
-
|number = 103
+
|number = 359
-
|first_author = Eva Robbrecht
+
|first_author = Guillermo Gim&eacute;nez de Castro
|second_author =  
|second_author =  
-
|publish_date = 8 June 2009
+
|publish_date = 31 September 2019
-
|description = Spectacular coronal effects with no chromospheric counterpart
+
|description = Flare radiation at the highest frequencies can be bremsstrahlung
-
|image = icon103.jpg
+
|image=Icon359.png}}
-
}}
+
{{Nugget Badge
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|title = Hard X-ray Pulsations in Flares
+
|title = The "Last Best" Flares
-
|number = 102
+
|number = 358
-
|first_author = Andrew Inglis &
+
|first_author = Hugh Hudson,
-
|second_author = Valery Nakariakov
+
|second_author = Ed Cliver, and Brian Dennis
-
|publish_date = 25 May 2009
+
|publish_date = 24 September 2019
-
|description = "Coronal seismology" via hard X-rays and microwaves
+
|description = Major flares tend to happen at the very ends of sunspot cycles
-
|image = icon102.png
+
|image=Icon358.png}}
-
}}
+
{{Nugget Badge
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|title = RHESSI microflares - Flare Cartoons and Reality
+
|title = Dynamic Processes of the Moreton Wave on 2014 March 29‎
-
|number = 101
+
|number = 357
-
|first_author = Sigrid Berkebile-Stoiser
+
|first_author = Denis Cabezas
-
|second_author =  
+
|second_author = and the FMT team
-
|publish_date = 11 May 2009
+
|publish_date = 16 September 2019
-
|description = Do the standard cartoon models of solar flares describe the microflares as well?
+
|description = A beautiful Moreton wave excited by the best-observed flare ever
-
|image = icon101b.png
+
|image=Icon357.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = RHESSI - Concept to Fruition
+
|title = EVE-RHESSI DEM Models and the Low-energy Cutoff for Nonthermal Electrons
-
|number = 100
+
|number = 356
-
|first_author = Brian Dennis &
+
|first_author = Jim McTiernan
-
|second_author = Bob Lin
+
|second_author =  
-
|publish_date = 29 April 2009
+
|publish_date = 9 September 2019
-
|description = A brief history of RHESSI.
+
|description = Characterizing flare temperature distributions helps to define the non-thermal energy release
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|image = Icon100.jpg
+
|image=Icon356.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Cycle 24 - don't panic yet!
+
|title = Stealth Coronal Mass Ejections from Active Regions
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|number = 99
+
|number = 355
-
|first_author = Leif Svalgaard and
+
|first_author = Jennifer O'Kane
-
|second_author = Hugh Hudson
+
|second_author =  
-
|publish_date = 13 April 2009
+
|publish_date = 26 August 2019
-
|description = Cycle 24 is definitely late in arriving, and it's interesting, but this probably has happened before.
+
|description = Perhaps just feeble versions of the same magnetic disease...
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|image = icon99.jpg
+
|image=Icon355.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Chree Analysis for Flares
+
|title = Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?‎
-
|number = 98
+
|number = 354
-
|first_author = Hugh Hudson
+
|first_author = Yuta NOTSU
|second_author =  
|second_author =  
-
|publish_date = 30 March 2009
+
|publish_date = 15 July 2019
-
|description = Exploring Chree analysis as applied to total solar irradiance measurements of flares.
+
|description = Kepler superflares hint at solar superflares
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|image = icon98.jpg
+
|image=Icon354.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = High Temperatures in Active Regions
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|title = Localized Microwave and EUV Bright Structures in an Eruptive Prominence
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|number = 97
+
|number = 353
-
|first_author = Jim McTiernan
+
|first_author = Jing HUANG
|second_author =  
|second_author =  
-
|publish_date = 16 March 2009
+
|publish_date = 22 June 2019
-
|description = RHESSI discovers high temperatures, well above those of the corona, in quiescent active regions.
+
|description = Detailed correlations between EUV and microwaves in prominence fine structures
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|image = icon97.jpg
+
|image=Icon353.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = The Jakimiec Track
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|title =   Broken-up hard X-ray spectra found for a loop-top source during a solar limb flare
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|number = 96
+
|number = 352
-
|first_author = Hugh Hudson
+
|first_author = Hao NING,
-
|second_author = and Fabio Reale
+
|second_author = Yao CHEN and Jeongwoo LEE
-
|publish_date = 2 March 2009
+
|publish_date = 16 June 2019
-
|description = A recent re-analysis of the relationship between emission measure and temperature in flares stimulates this new nugget.
+
|description = SOL2017-09-10 coronal hard X-ray sources
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|image = icon96.png
+
|image=Icon352.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Coronal implosion
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|title =   The Cosmic-Ray Shadow and Coronal Magnetism
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|number = 95
+
|number = 351
-
|first_author = Rui Liu
+
|first_author = Frederik Tenholt
|second_author =  
|second_author =  
-
|publish_date = 16 February 2009
+
|publish_date = 27 May 2019
-
|description = Though we expect flare implosions, we frequently observe explosions (i.e. eruptions). In this nugget, an observation of a contracting flare is described and analyzed.
+
|description =  The coronal magnetic field measured in Antarctica
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|image = icon95.png
+
|image=Icon351.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Other Discoveries from Carrington%27s Flare
+
|title =   Kristian Birkeland
-
|number = 94
+
|number = 350
 +
|first_author = Hugh HUDSON
 +
|second_author = and  Lyndsay FLETCHER
 +
|publish_date = 6 May 2019
 +
|description =  Space weather a century ago: Kristian Birkeland
 +
|image=Icon350.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Warm UV loops heated by small-scale cancellation events
 +
|number = 349
 +
|first_author = Seray ŞAHIN
 +
|second_author = and  Vasyl YURCHYSHYN
 +
|publish_date = 22 April 2019
 +
|description =  Precisely locating the footpoints of warm coronal loops helps identify their source(s) of excitation
 +
|image=Icon349.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Multiple Regions of Shock-accelerated Particles during a Solar Coronal Mass Ejection
 +
|number = 348
 +
|first_author = Diana MOROSAN
 +
|second_author = 
 +
|publish_date = 1 April 2019
 +
|description =  LOFAR identifies herringbone sources within the flank of the SOL2017-09-10 shock - no joke
 +
|image=Icon348.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Persistent Quasi-Periodic Pulsations Detected During the Large X8.2 Solar Flare
 +
|number = 347
 +
|first_author = Laura HAYES
 +
|second_author =  and Peter GALLAGHER
 +
|publish_date = 25 March 2019
 +
|description =  The most beautiful flare has the most beautiful pulsations
 +
|image=Icon347.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Is the coronal magnetic field braiding?
 +
|number = 346
 +
|first_author = Markus ASCHWANDEN
 +
|second_author = 
 +
|publish_date = 11 March 2019
 +
|description =  This iconic cartoon does not relate well to the observations
 +
|image=Icon346.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  An energetic pre-flare: electron distributions in magnetic reconnection outflows
 +
|number = 345
 +
|first_author = Marina BATTAGLIA,
 +
|second_author =  Eduard KONTAR and Galina MOTORINA
 +
|publish_date = 18 February 2019
 +
|description =  Assessing energy partition in a pre-impulsive flare development
 +
|image=Icon345.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Linear Polarization in H-alpha Flares
 +
|number = 344
 +
|first_author = Tomoko KAWATE
 +
|second_author =  and Yoichiro HANAOKA
 +
|publish_date = 4 February 2019
 +
|description =  H-alpha polarization is rarely observable but, in once case, very suggestive
 +
|image=Icon344.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Short-Period Waves
 +
|number = 343
 +
|first_author = Sijie YU
 +
|second_author =  and Bin CHEN
 +
|publish_date = 21 January 2019
 +
|description =  New decimetric imaging spectroscopy suggests Alfv&eacute;nic energy transport in flares
 +
|image=Icon343.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  The Interesting RHESSI/SAS Archive
 +
|number = 342
 +
|first_author = Hugh HUDSON
 +
|second_author =  and Martin FIVIAN
 +
|publish_date = 8 January 2019
 +
|description =  The full mission database shows RHESSI to have been very stable geometrically
 +
|image=Icon342.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Homologous White Light Solar Flares‎
 +
|number = 341
 +
|first_author = Paolo ROMANO
 +
|second_author =  and Abouazza ELMHAMDI
 +
|publish_date = 31 December 2018
 +
|description =  Homologous white-light flares, in rapid succession, and coronal null points
 +
|image=Icon341.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  The flight of FOXSI-3
 +
|number = 340
 +
|first_author = Lindsay GLESENER
 +
|second_author =  and Noriyuki NARUKAGE
 +
|publish_date = 10 December 2018
 +
|description =  Single-photon counting and direct focusing across hard and soft energies
 +
|image=Icon340.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Stellar Flares and Starspots
 +
|number = 339
 +
|first_author = Lauren DOYLE
 +
|second_author = 
 +
|publish_date = 3 December 2018
 +
|description =  Stellar flares don't spatially match their starspots
 +
|image=Icon339.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Neutron Production in Solar Flares
 +
|number = 338
 +
|first_author = Ron MURPHY
 +
|second_author =  and Gerry SHARE
 +
|publish_date = 26 November 2018
 +
|description =  Neutron astronomy helps us understand solar flares
 +
|image=Icon338.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Cycle 25 Strikes Again
 +
|number = 337
 +
|first_author = Kamil BICZ
 +
|second_author = 
 +
|publish_date = 20 November 2018
 +
|description =  A second, larger Cycle 25 sunspot
 +
|image=Icon337.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Remembering Marcos Machado via his research
 +
|number = 336
 +
|first_author = Hugh HUDSON
 +
|second_author = 
 +
|publish_date = 13 November 2018
 +
|description =  Recalling a friend and colleague, and admiring his final paper
 +
|image=Icon336.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  CORONAS/SPIRIT Mg XII and Nanoflares‎
 +
|number = 335
 +
|first_author = Anton REVA
 +
|second_author = 
 +
|publish_date = 22 October 2018
 +
|description =  Monochromatic Mg XII spectroheliography sets severe limits on nanoflare heating models
 +
|image=Icon335.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  White-light Emission and Non-thermal Electrons‎
 +
|number = 334
 +
|first_author = Kyoung-Sun LEE
 +
|second_author = 
 +
|publish_date = 8 October 2018
 +
|description =  An intimate relationship between accelerated electrons and visible flare continuum
 +
|image=Icon334.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Coronal Hard X-ray Sources Revisited
 +
|number = 333
 +
|first_author = Brian DENNIS
 +
|second_author = 
 +
|publish_date = 24 September 2018
 +
|description =  Reporting some over-interpretation of the evidence for "coronal thick targets"
 +
|image=Icon333.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Photospheric response to a flare
 +
|number = 332
 +
|first_author = Mike WHEATLAND
 +
|second_author = 
 +
|publish_date = 17 September 2018
 +
|description =  Sudden changes in the magnetic field in the low atmosphere associated with particle acceleration
 +
|image=Icon332.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles
 +
|number = 331
 +
|first_author = David WEBB
 +
|second_author = 
 +
|publish_date = 27 August 2018
 +
|description = A digital archive of Pat McIntosh's 44 years of solar synoptic observations 
 +
|image=Icon331.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Understanding the co-spatial return current in solar flares
 +
|number = 330
 +
|first_author = Meriem ALAOUI
 +
|second_author =  and Gordon HOLMAN
 +
|publish_date = 6 August 2018
 +
|description = Completing the circuit in a thick-target model 
 +
|image=Icon330.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  3D Magnetic Reconnection at a Coronal Null Point
 +
|number = 329
 +
|first_author = Shane MALONEY,
 +
|second_author = Aidan O'Flannagain and Peter Gallagher
 +
|publish_date = 30 July 2018
 +
|description = Large-scale reconnection involved in Type I radio noise storm 
 +
|image=Icon329.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  The true dawn of multimessenger astronomy
 +
|number = 328
|first_author = Hugh Hudson
|first_author = Hugh Hudson
|second_author =  
|second_author =  
-
|publish_date = 2 February 2009
+
|publish_date = 23 July 2018
-
|description = During the sesquicentennial of the Carrington flare, let us not forget how "Space Weather" got its start.
+
|description = Ever since the Carrington flare  
-
|image = Icon94.jpg
+
|image=Icon328.png}}
-
}}
+
 
 +
{{Nugget Badge
 +
|title =  Microwave Imaging Spectroscopy of Flares is Here‎
 +
|number = 327
 +
|first_author = Dale E. Gary,
 +
|second_author = EOVSA and RHESSI Teams
 +
|publish_date = 16 July 2018
 +
|description = Microwave imaging spectroscopy takes a giant leap forward with SOL2017-09-10
 +
|image=Icon327.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Coronal nanoflares powered by footpoint reconnection
 +
|number = 326
 +
|first_author = Pradeep Chitta,
 +
|second_author = Hardi Peter, and Sami Solanki
 +
|publish_date = 9 July 2018
 +
|description = Coronal nanoflares in active region cores can be powered by the magnetic reconnection in the lower solar atmosphere
 +
|image=Icon326.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  A remarkable, but confused, coronal hard X-ray source
 +
|number = 325
 +
|first_author = Alexandra Lysenko,
 +
|second_author = Larisa Kashapova and Hugh Hudson
 +
|publish_date = 25 June 2018
 +
|description = A remarkable flare in 1999 adds to our short list of extended coronal hard X-ray/microwave sources
 +
|image=Icon325.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Understanding HMI pseudocontinuum in white-light flares‎
 +
|number = 324
 +
|first_author = Michal &Scaron;vanda
 +
|second_author = et al.
 +
|publish_date = 28 May 2018
 +
|description = The HMI pseudocontinuum (Ic) is ill-calibrated in regions with strong fields, i.e. for white-light flares
 +
|image=Icon324.png}}
{{Nugget Badge
{{Nugget Badge
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|title = Collapsing Traps
+
|title = To beam or not to beam - that is (still) the question
-
|number = 93
+
|number = 323
-
|first_author = Boris Somov
+
|first_author = Paulo Sim&otilde;es
|second_author = and Hugh Hudson
|second_author = and Hugh Hudson
-
|publish_date = 21 January 2009
+
|publish_date = 14 May 2018
-
|description = Large-scale plasma motions, as in magnetic reconnection, can directly accelerate high-energy particles.
+
|description = Descriptions of the lower solar atmosphere of flares <i>ca.</i> Cycle 21 sound surprisingly current
-
|image = Icon93.jpg
+
|image=Icon323.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = RHESSI Simulations of Complicated Flares
+
|title = Observation of Cosmic Ray Spallation Events from SoHO‎
-
|number = 92
+
|number = 322
-
|first_author = Lyndsay Fletcher
+
|first_author = Serge Koutchmy
-
|second_author = and Jim McTiernan
+
|second_author = and Ehsan Tavabi
-
|publish_date = 5 January 2009
+
|publish_date = 7 May 2018
-
|description = Comparing RHESSI images with ones simulated from TRACE "white light" reveals striking similarities but intriguing differences.
+
|description = LASCO's images capture high-energy nuclear interactions from cosmic-ray hits
-
|image = Icon92.jpg
+
|image=Icon322.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Cycle 24
+
|title = A Sunspot from Cycle 25 for sure
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|number = 91
+
|number = 321
-
|first_author = Hugh Hudson
+
|first_author = Tomek Mrozek
-
|second_author = and Steven Christe
+
|second_author = and Hugh Hudson
-
|publish_date = 22 December 2008
+
|publish_date = 10 April 2018
-
|description = Solar cycle 24 seems to be delayed. Where are the spots? This Nugget discusses the problem and reviews the recent Solar24 meeting, the first in our field to be [http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Solar_Cycle_24 Wikified].
+
|description = YES! Cycle 25 is here!
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|image = Icon91.png
+
|image=Icon321.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Inverse Compton X-rays from relativistic flare leptons
+
|title = Blue-wing enhancement of the Mg II h and k lines in a flare
-
|number = 90
+
|number = 320
-
|first_author = Alec MacKinnon
+
|first_author = Akiko TEI
-
|second_author = and Procheta Mallik
+
|second_author =
-
|publish_date = 1 December 2008
+
|publish_date = 9 April 2018
-
|description = Compton scattering makes the Sun visible at high energies, via processes related to the galactic cosmic rays. This is not your ordinary Bremsstrahlung...
+
|description = Flare loops involve a cool upflow preceding the hot evaporation flow
-
|image = Icon90.jpg
+
|image=Icon320.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = The Rise and Fall of The Low Energy Cut Off
+
|title = NuSTAR detects X-ray flares in the quiet Sun
-
|number = 89
+
|number = 319
-
|first_author = Ewan Dickson
+
|first_author = Matej Kuhar
-
|second_author = and Eduard Kontar
+
|second_author = and S&auml;m Krucker
-
|publish_date = 17 November 2008
+
|publish_date = 26 March 2018
-
|description = Solar hard X-rays tend to have a power-law distribution in energy, implying infinite photon numbers at low energy (a "soft X-ray catastrophe"). Can we observe what limits this behavior?
+
|description = Quiet-Sun flares may not be powerful, but they look a lot like ordinary flares
-
|image = Icon89.png
+
|image=Icon319.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = SEPs Link not Confirmed
+
|title = Homologous CME/flares from AR 12371
-
|number = 88
+
|number = 318
-
|first_author = Gerry Share
+
|first_author = Panditi Vemareddy
-
|second_author = and Allan Tylka
+
|second_author = and Pascal Demoul&iacute;n
-
|publish_date = 3 November 2008
+
|publish_date = 19 March 2018
-
|description = The spectral evolution of a solar hard X-ray burst may give a clue to the acceleration of solar energetic particles (SEPs). This RHESSI Science Nugget questions the validity of this predictor.
+
|description = An excellent set of homologous flare/CMEs analyzed and explained
-
|image = Yohkoh countrate 06051998.jpg
+
|image=Icon318.png}}
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = The SphinX Instrument on CORONAS-PHOTON
+
|title = Non-Maxwellian Diagnostics from SDO/EVE Spectra of an X-class Flare
-
|number = 87
+
|number = 317
-
|first_author = Janusz Sylwester
+
|first_author = Elena Dzif&#x10d;&aacute;kov&aacute;
-
|second_author = and Ken Phillips
+
|second_author = and Jaroslav Dud&iacute;k
-
|publish_date = 22 October 2008
+
|publish_date = 16 February 2018
-
|description = An exciting new instrument will begin observations at an exciting time.
+
|description = Ratios of high-excitation ions can readily detect &kappa;-distributions in flare plasmas
-
|image = CORONAS signing.jpg
+
|image=Icon317.png}}
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}}
+
{{Nugget Badge
{{Nugget Badge
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|title = The Good Guys and the Rascals
+
|title = Joint MinXSS and RHESSI Flare X-ray Spectra between 1 and 15 keV
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|number = 86
+
|number = 316
-
|first_author = B. Dabrowski
+
|first_author = Chris Moore, Brian Dennis and the MinXSS Science Team
-
|second_author = and Arnold Benz
+
|publish_date = 5 February 2018
-
|publish_date = 13 October 2008
+
|description = MinXSS adds systematic views of flare soft X-ray spectra to RHESSI imagery
-
|description = Solar decimetric radio bursts - but only the good guys - correlate well with RHESSI hard X-rays.
+
|image=Icon316.png}}
-
|image = Icon 86.jpg
+
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = RHESSI Optical Images
+
|title = Parameterized Flare Models with Chromospheric Compressions
-
|number = 85
+
|number = 315
-
|first_author = H. Jabran Zahid
+
|first_author = Adam Kowalski & Joel Allred
-
|second_author = and Hugh Hudson
+
|publish_date = 17 January 2018
-
|publish_date = 2008-09-29
+
|description = A new approach to modeling the lower flare atmosphere
-
|description = RHESSI makes optical images as well as X-ray and gamma-ray ones. This Nugget explains how.
+
|image=FlareModelsKowalskiAllred.png}}
-
|image = RHESSI_optical_images_icon.png
+
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = Flare Plasma Abundances - New X-ray Observations
+
|title = A Curious Sunspot Group in 2018
-
|number = 84
+
|number = 314
-
|first_author = Brian Dennis
+
|first_author = Hugh Hudson
-
|second_author = and Richard Starr
+
|publish_date = 14 January 2018
-
|publish_date = 2008-09-15
+
|description = The first new sunspot group of 2018 emerged at the wrong latitude
-
|description = MESSENGER is now exploring Mercury. It is also helping RHESSI to understand the solar X-ray spectrum and measure elemental abundances in flares.
+
|image = Icon314.png}}
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|image = Icon 84.jpg
+
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = [http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=83 Hard X-rays from a Jet?]
+
|title = Tecumseh's Eclipse and Astrophysics
-
|number = 83
+
|number = 313
-
|first_author = Hazel Miller Bain
+
|first_author = Hugh Hudson
-
|second_author = and Lyndsay Fletcher
+
|publish_date = 25 December 2017
-
|publish_date = 2008-08-27
+
|description = The solar corona was first recognized as such, and named, in an eclipse of 1806
-
|description = Observations during the rise phase of a M5.4 flare suggests that hard x-rays may be associated with a jet observed by TRACE.
+
|image = Icon313.png}}
-
|image = Icon 83.jpg
+
-
}}
+
{{Nugget Badge
{{Nugget Badge
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|title = [http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=82 Are Stellar Flares like Solar Flares?]
+
|title = Hunting for Hidden Tiny Flares
-
|number = 82
+
|number = 312
 +
|first_author = Shin-nosuke ISHIKAWA
 +
|publish_date = 27 November 2017
 +
|description =  FOXSI-2 says that episodic energy releases are still viable as a part of the coronal heating problem.
 +
|image = Icon312.png}}
 +
 
 +
{{Nugget Badge
 +
|title =  Unusual Type III Burst Dynamics Produced by Diverging Magnetic Fields
 +
|number = 311
 +
|first_author = Patrick McCauley
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|publish_date = 20 November 2017
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|description =  Unusual type III bursts follow coronal separatrix structures.
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|image = Icon311.png}}
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{{Nugget Badge
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|title = Valderrama in the 21st Century
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|number = 310
|first_author = Hugh Hudson
|first_author = Hugh Hudson
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|second_author = and Beate Stelzer
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|publish_date = 31 October 2017
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|publish_date = 2008-08-11
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|description = A newly-described white-light flare from the 19th century!..
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|description = In this Nugget, we explore an extrasolar flare (aka stellar flare). These stellar and solar flares are similar but it is often in subtle differences that we may learn the most.
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|image = Icon310.png}}
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|image = Icon 82.jpg
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}}
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{{Nugget Badge
{{Nugget Badge
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|title = [http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=81 The Microflare Height Distribution]
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|title = Electron Scattering in the Flaring Corona
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|number = 81
+
|number = 309
-
|first_author = Steven Christe
+
|first_author = Sophie Musset
 +
|publish_date = 24 October 2017
 +
|description = Diffusive transport may contribute to the trapping of electrons in coronal X-ray sources
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|image = Icon309.png}}
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{{Nugget Badge
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|title =  The Power of Turbulence
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|number = 308
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|first_author = Nic Bian
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|publish_date = 25 September 2017
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|description = Turbulent energy content may underlie flare energy transfer, magnetic reconnection, and particle acceleration
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|image = Icon308.png}}
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{{Nugget Badge
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|title = The Kelvin Force and Loop-Top Concentration
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|number = 307
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|first_author = Kiyoto SHIBASAKI
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|publish_date = 18 September 2017
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|description = New physics can explain the perplexing overpressure at the flare looptop regions
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|image = Icon307.png}}
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{{Nugget Badge
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|title = The Last Best Flare of Cycle 24?
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|number = 306
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|first_author = S&auml;m Krucker
|second_author = and Hugh Hudson
|second_author = and Hugh Hudson
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|publish_date = 2008-07-28
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|publish_date = 11 September 2017
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|description = Another look at microflare positions...
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|description = Right on schedule, Cycle 24 has produced a great flare (with a GLE)
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|image = Icon 81.jpg
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|image = Icon306.png}}
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}}
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{{Nugget Badge
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|title = Electric Current Neutralization and Solar Eruption in Active Regions
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|number = 305
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|first_author = Yang LIU
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|second_author =
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|publish_date = 28 August 2017
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|description = Active current systems in the solar corona don't have return currents
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|image = Icon305.png}}
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{{Nugget Badge
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|title = RHESSI and the Megamovie
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|number = 304
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|first_author = Hugh Hudson, Laura Peticolas,
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|second_author = and Juan Carlos Mart&iacute;nez Oliveros
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|publish_date = 31 July 2017
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|description = A wholly new way to view a solar eclipse, and to do solar astrometry
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|image = Icon304.png}}
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{{Nugget Badge
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|title = Bastille Day 2017
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|number = 303
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|first_author = Hugh Hudson
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|second_author = and S&auml;m Krucker
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|publish_date = 24 July 2017
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|description = Interesting flares really do happen on Bastille Day...
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|image = Icon303.png}}
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{{Nugget Badge
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|title = The Solar X-ray Limb III
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|number = 302
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|first_author = Marina Battaglia
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|second_author = and Gordon Hurford
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|publish_date = 12 June 2017
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|description = RHESSI succeeds with a wholly new way to measure the solar diameter
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|image = Icon302.png}}
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 +
{{Nugget Badge
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|title = Double Coronal X-ray and Microwave Sources Associated With A Magnetic Breakout Solar Eruption
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|number = 301
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|first_author = Yao CHEN
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|second_author =
 +
|publish_date = 29 May 2017
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|description = A different explanation of the double coronal hard X-ray sources
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|image = Icon301.png}}
{{Nugget Badge
{{Nugget Badge
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|title = [http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=80 The McClymont Jerk]
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|title = A Lasso Model for Solar Gamma-ray Events
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|number = 80
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|number = 300
|first_author = Hugh Hudson
|first_author = Hugh Hudson
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|second_author = and Brian Welsch
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|second_author =
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|publish_date = 2008-07-14
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|publish_date = 15 May 2017
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|description = The sudden energy release of a flare in the solar atmosphere has many consequences. One of them may be the McClymont Jerk.
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|description = A toy model hoping to explain the SEP/LAT relationship
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|image = Icon 80.jpg
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|image = Icon300.png}}
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}}
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For all previous Nuggets go to the [http://sprg.ssl.berkeley.edu/~tohban/nuggets/ old RHESSI Science Nugget Page.]
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[[RHESSI Science Nuggets 200 to 299|Next Nuggets]]

Latest revision as of 12:34, 26 April 2024

Welcome to the RHESSI Science Nuggets: science notes from RHESSI. The following is a time-ordered list of the latest Nuggets added to the wiki. An alphabetical list of wiki Nuggets is also available as well as yearly lists. We welcome volunteer authors - please see our page of help for authors

468 Is there HOPE for Hyder flares...
15 March 2024 by Hugh HUDSON
Icon468.png
Filament eruptions/Hyder flares/disparitions brusques may all show HOPE. Click the title to read more.
467 Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using H-alpha and EUV Spectra Taken by SMART/SDDI and SDO/EVE
19 February 2024 by Takato OTSU
Icon467.png
Whole-Sun spectroscopic observations can readily detect ejecta. Click the title to read more.
466 Unexpected Asymmetry in GeV Emission
15 January 2024 by Bruno ARSIOLI and Elena ORLANDO
Icon466.png
The high-energy solar gamma radiation shows inexplicable but fascinating properties. Click the title to read more.
465 When it rippled in one place and exploded in another
25 December 2023 by Ivan ZIMOVETS
Icon465.png
Pulsations precede a flare, but seem unrelated. Click the title to read more.
464 Solar flares: evaporation and simulation‎
18 December 2023 by Malcolm DRUETT
Icon464.png
Fitting beam electrons into multi-dimensional models. Click the title to read more.
463 Pre-impulsive and Impulsive Phases of the March 28, 2022 Sub-Terahertz Flare
11 December 2023 by Galina G. MOTORINA
Icon463.png
A flare with an increasing sub-THz spectrum and sub-THZ precursor information. Click the title to read more.
462 Coronal Bright Points
27 November 2023 by Daniel NÓBREGA-SIVERIO
Icon462.png
Bright EUV rowel-like structures can result from null-point reconnection. Click the title to read more.
461 Aurora-like Radio Emission from a Sunspot
20 November 2023 by Sijie YU
Icon461.png
Maser action above a sunspot. Click the title to read more.
460 Search for a Flare Anticipation Index (FAI)
13 November 2023 by Hugh HUDSON and Jim McTiernan
Icon460.png
Quantifying flare precursors on a few-minute time scale. Click the title to read more.
459 Bouncing motions of fast electrons using Nobeyama Radioheliograph
6 November 2023 by Keitarou MATSUMOTO
Icon459.png
Solar evidence for conservation of second adiabatic invariant in particle motion. Click the title to read more.
458 Impact of nanoflare heating in the lower solar atmosphere
30 October 2023 by Helle BAKKE
Icon458.png
The behavior of nanoflare fast electrons in Bifrost models. Click the title to read more.
457 Precise timing of flare footpoint sources from mid-infrared observations‎
23 October 2023 by Paulo SIMÕES et al.
Icon457.png
Mid-IR observations at high spatial and high temporal resolution: Conjugacy. Click the title to read more.
456 The Greatest GOES Flares‎
25 September 2023 by Hugh HUDSON and Ed CLIVER
Icon456.png
The greatest GOES events, re-analyzed, fall short of expectations. Click the title to read more.
455 Introducing SunSketcher
11 September 2023 by Hugh HUDSON and Gordon EMSLIE
Icon455.png
Galloping towards roundup in the 2024 total solar eclipse. Click the title to read more.
454 TeV Gamma rays from the Quiescent Sun
21 August 2023 by Mehr Un NISA and John BEACOM
Icon454.png
Solar photons at unprecedented high energies. Click the title to read more.
453 Temporal and Spatial Characteristics of Hard X-Ray Sources in Flare Model with Vertical Current Sheet
7 August 2023 by Alexander SHABALIN, Eugenia OVCHINNIKOVA, and Yuri CHARIKOV
Icon453.png
Modeling betatron acceleration in current-sheet development.. Click the title to read more.
452 Spatial Distribution of Magnetic Reconnection Rate in an M6.5 Solar Flare
12 June 2023 by Ju JING
Icon452.png
Linking hard X-rays to high-resolution images that show reconnection rates.. Click the title to read more.
451 Statistical study of Type III bursts and associated HXR emissions
29 May 2023 by Nicole VILMER and Tomin JAMES
Icon451.png
Linking electron populations escaping from the Sun with those that RHESSI detects.. Click the title to read more.
450 Solar flare hard X-rays from the anchor points of an eruptive filament
15 May 2023 by Muriel STIEFEL
Icon450.png
A rare "four-ribbon" flare has been detected in hard X-rays.. Click the title to read more.
449 Did a Solar Flare Accelerate all the Ambient Electrons in the Coronal Acceleration Region?...
1 May 2023 by Gordon EMSLIE, Eduard KONTAR, Galina MOTORINA, and Brian DENNIS
Icon449.png
Considering SOL2017-09-10, probably not.. Click the title to read more.
448 Diagnostics of Spatially-Extended Turbulent Acceleration and Transport
24 April 2023 by Morgan STORES
Icon448.png
Drilling down into the detailed structure of solar-flare energy release by including turbulence with particle acceleration.. Click the title to read more.
447 RHESSI's Re-entry
17 April 2023 by Pascal SAINT-HILAIRE and Hugh HUDSON
Icon447.png
The final demise of RHESSI is this week. Click the title to read more.
446 A Glasgow geomagnetic observation of a solar flare
13 March 2023 by Hugh HUDSON, John MALONE-LEIGH, Graham WOAN, and Chris OSBORNE
Icon 446.png
Irish and Scottish geomagnetic observatories see a crochet much like that of the Carrington event. Click the title to read more.

{

445 Particle Acceleration in Two Coronal Jets
27 February 2023 by Yixian ZHANG
Icon445.png
Coronal jets with hard X-ray sources at disjoint locations. Click the title to read more.
444 The Curious First Sunquake of Solar Cycle 25‎
13 February 2023 by Alexander KOSOVICHEV
Icon444.png
A double whammy: two distinct sunquakes from SOL2022-05-10.. Click the title to read more.
443 Hard X-ray Pulsations via Gaussian Decomposition
30 January 2023 by Hannah COLLIER and Laura HAYES
Icon443.png
Flare hard X-ray time variations decomposed objectively. Click the title to read more.
442 A possible coronal magnetic flare precursor
16 January 2023 by Enrico LANDI
Icon442.png
Novel measurements of the coronal magnetic field may help with flare prediction. Click the title to read more.
441 A slow HOPE with microwave context
12 December 2022 by Hugh HUDSON
Icon441.png
A new microwave facility at Chashan Observatory, and a prototypical HOPE. Click the title to read more.
440 Rapid variations of Si IV spectra in a flare observed by IRIS at a sub-second cadence
14 November 2022 by Juraj LÖRINČÍK
Icon440.png
Transition-region lines in a flare have a Doppler component revealing quasi-periodic pulsations. Click the title to read more.
439 A Significant Sudden Ionospheric Disturbance Associated with a Massive Gamma-ray Burst
31 October 2022 by Laura HAYES and Peter GALLAGHER
Icon439.png
A first SID observed in broad daylight, from a source far far away. Click the title to read more.
438 Effects of Coronal Structures on the Dynamics of the Global Coronal Wave of SOL2017-09-10‎
17 October 2022 by Huidong HU, Ying D. LIU, and Bei ZHU
Icon438.png
The amazing global coronal wave of SOL2017-09-10 wrapped around the whole Sun, and displayed transmission and reflection at both polar coronal holes. Click the title to read more.
437 KW-Sun: The Konus-Wind Solar Flare Database in Hard X-Ray and Soft Gamma-Ray Ranges
26 September 2022 by Alexandra LYSENKO
Icon437.png
An unrivaled hard X-ray and gamma-ray database is entering its third activity maximum. Click the title to read more.
436 First Detection of Kink Oscillations with Solar Orbiter
19 September 2022 by Sihui ZHONG et al.
Icon436.png
SolO sees coronal oscillations as well as AIA can, and even better. Click the title to read more.
435 Energetic Neutral Hydrogen from Large Solar Flares
6 September 2022 by Glenn MASON
Icon435.png
A rediscovered data treasury reveals the occurrence of many flare/CME events producing solar high-energy neutral atoms. Click the title to read more.
434 Fifty-year Anniversary of the First Detection of Gamma rays from a Solar Flare
8 August 2022 by Jim Ryan, Brian Dennis, and Phil Dunphy
Icon434.png
The rich astrophysics of gamma-ray astronomy began with solar observations fifty years ago. Click the title to read more.
433 Fast Prograde Flows in Solar Active Regions
25 July 2022 by Hugh HUDSON
Icon433.png
Unexpected, unpredicted, and not modeled yet - weird flows in hot active-region loops. Click the title to read more.
432 Undetected Minority-polarity Flux, Moss, and Coronal Heating
11 July 2022 by Yi-Ming WANG
Icon432.png
There's plenty of room in "unipolar" active regions for both polarities, and there is good evidence for them. Click the title to read more.
431 Thermal/Nonthermal with MinXSS and RHESSI
13 June 2022 by Shunsaku NAGASAWA
Icon431.png
Time-domain studies of improved X-ray spectra reveal a "super-hot' component. Click the title to read more.
430 Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021
30 May 2022 by Yu XU and Hui TIAN
Icon430.png
The observation of the full 3d velocity of a CME, for an anniversary event. Click the title to read more.
429 Carl Størmer
15 April 2022 by Hugh HUDSON and Lyndsay FLETCHER
Icon429.png
Størmer and the theory of trapping in loops. Click the title to read more.
428 Solar Hard X-rays with Insight
21 March 2022 by Wei WANG and Ping ZHANG
Icon428.png
A spectacular limb flare introduces Insight/HXMT, a new observational resource. Click the title to read more.
427 Probing chromospheric current sheets using SST and ALMA co-observations
21 February 2022 by João da SILVA SANTOS
Icon427.png
Emerging magnetic flux appears in ALMA images reflecting coronal current sheets. Click the title to read more.
426 A demonstration of STIX hard X-ray imaging spectroscopy capabilities for an X-class flare (SOL2021-10-28)
7 February 2022 by Andrea BATTAGLIA, Hannah COLLIER, and Säm KRUCKER
Icon426.png
STIX imaging of an X-class flare marks its success. Click the title to read more.
425 A solar flare driven by thermal conduction observed in mid-infrared
24 January 2022 by Guillermo GIMÉNEZ de CASTRO
Icon425.png
Strong 10-micron emission from a GOES C2 flare suggests conductive heating. Click the title to read more.
424 Disk Occultation of a Lopsided Sun‎
10 January 2022 by Hugh HUDSON, Stephen WHITE and Säm KRUCKER
Icon424.png
Observing a spotless Sun can enable observations of the faint corona.. Click the title to read more.
423 Resolving two distinct thermal X-ray components in a compound solar flare
28 December 2021 by Zhenjun ZHOU and Rui LIU
Icon423.png
Superhot coronal sources may be independent loop systems. Click the title to read more.
422 Bridging solar flares to coronal mass ejections
14 December 2021 by Markus ASCHWANDEN
Icon422.png
The Neupert effect allows us to trace coronal mass ejections seamlessly. Click the title to read more.
421 The Jakimiec Diagnostic Diagram
29 November 2021 by Hugh HUDSON
Icon421.png
The joint variation of GOES temperature and emission measure discloses new features via an old tool. Click the title to read more.
420 First look at ALMA/HInode/IRIS microflares
8 November 2021 by Toshifumi SHIMIZU et al.
Icon420.png
High-resolution ALMA and multiwavelength observations of microflaring. Click the title to read more.
419 Thomson scattering near sunspots
25 October 2021 by Pascal Saint-Hilaire et al.
Icon419.png
Completing the modeling of low-coronal Thomson polarimetry. Click the title to read more.
418 A Non-PFSS Global Coronal Model
11 October 2021 by Oliver RICE and Anthony YEATES
Icon418.png
Modeling as convenient as PFSS but much more realistic. Click the title to read more.
417 Manifold Nonthermality
27 September 2021 by Marina BATTAGLIA et al.
Icon417.png
Even weak flares involve multiple sites of non thermal activity. Click the title to read more.
416 X-Rays from a Type I Radio Burst
20 September 2021 by R. RAMESH
Icon416.png
A first identification of type I radio emission with hot plasma. Click the title to read more.
415 Do Hot Onsets Predict Flare Magnitudes?
30 August 2021 by Hugh HUDSON
Icon415.png
Maybe we can tell how big a flare is going to be from its initial development.... Click the title to read more.
414 Confined or Eruptive?
16 August 2021 by Ting LI et al.
Icon414.png
Increased magnetic flux reduces CME eruptivity. Click the title to read more.
413 Impulsive and Gradual Eruptive Gamma Flares and Associated CMEs
19 July 2021 by Alexey STRUMINSKY, Irina GRIGORIEVA and Andrei SADOVSKI
Icon373.png
Extreme behavior of flare/CME events explained by environment. Click the title to read more.
412 The Morphology of Flare Time Profiles
12 July 2021 by Larisa KASHAPOVA et al.
Icon412.png
Systematic comparison of solar and stellar flaring time profiles. Click the title to read more.
411 Flare Pulsation and the Heliosphere
5 July 2021 by Brendan CLARKE et al.
Icon411.png
Flare pulsations link closely to the distant heliosphere. Click the title to read more.
410 STIX, the Hard X-Ray Telescope on board Solar Orbiter
28 June 2021 by Andrea Francesco BATTAGLIA and Säm KRUCKER
Icon410.png
STIX is operational and producing great data. Click the title to read more.
409 Nonequilibrium Ionization of Flare Plasma Observed by Hinode/EIS
14 June 2021 by Shinsuke IMADA
Icon409.png
Evidence for non-equilibrium ionization in the current sheet of SOL2017-09-10. Click the title to read more.
408 Effects of Flares on Solar p-modes
26 April 2021 by Maria-Cristina RABELLO SOARES and Frederic BAUDIN
Icon408.png
No detectable p-mode amplitude changes due to solar flares. Click the title to read more.
407 Subsecond Spikes in Solar Flare X-ray Flux as Seen by Fermi GBM
19 April 2021 by Trevor KNUTH and Lindsay GLESENER
Icon407.png
A new analysis technique pushes hard X-ray time scales to 0.1 sec or faster. Click the title to read more.
406 Negative He 10830 Flare Ribbons and Non-thermal Electrons
12 April 2021 by Graham KERR
Icon406.png
A 1D radiation hydrodynamics model can explain the dark leading edges of He I flare ribbons. Click the title to read more.
405 Tracing the sources of gradual solar energetic particle events
29 March 2021 by David H. BROOKS and Stephanie L. YARDLEY
Icon405.png
Chemical abundances in SEPs suggest an origin in flare-related moss regions. Click the title to read more.
404 The Superflare SOL2017-09-06: from submm to mid-IR
15 March 2021 by Guillermo (Guigue) GIMÉNEZ DE CASTRO
Icon404.png
Glimpsing the "missing decades" of the flare emission spectrum. Click the title to read more.
403 The Neupert Effect Revisited
8 March 2021 by Jiong QIU
Icon403.png
Two time scales for heating individual flare strands. Click the title to read more.
402 FLUKA as a tool for interpreting flare gamma-rays
1 March 2021 by Alec MACKINNON
Icon402.png
The nuclear physics of solar flares captured in a detailed model. Click the title to read more.
401 A Collective Study of 11 NuSTAR Microflares
22 February 2021 by Jessie DUNCAN and Lindsay GLESENER
Icon401.png
Swarms of NuSTAR micro flares. Click the title to read more.

{{

400 A Solar FRB
15 February 2021 by Dale GARY and Hugh HUDSON
Icon400.png
A new frontier in the solar time domain. Click the title to read more.
399 Richard Schwartz
25 January 2021 by Brian DENNIS and Hugh HUDSON
Icon399.jpg
Remembering a friend and colleague. Click the title to read more.
398 Observing Solar Flare X-ray Polarization with Prospective CubeSat Missions
4 January 2021 by Natasha JEFFREY
Icon398.png
The polarization of the solar X-ray spectrum generally remains to be observed. Click the title to read more.
397 Solar effects in the local interstellar medium
14 December 2020 by Don GURNETT and Hugh HUDSON
Icon397.png
Relativistic particle events observed _in situ_ in the interstellar medium. Click the title to read more.
396 Investigation of Small-Scale Energy Releases in Hard X-rays with ​FOXSI
7 December 2020 by Subramania ATHIRAY and Juliana VIEVERING
Icon396.png
Hard X-rays and high temperatures from the feeblest microflares. Click the title to read more.
395 What drives impulsive coronal heating?
30 November 2020 by Pradeep CHITTA et al.
Icon395.png
Impulsive footpoint emissions suggest magnetic reconnection in the chromosphere. Click the title to read more.
394 Probing the solar coronal heating function with slow magnetoacoustic waves
16 November 2020 by Dmitrii KOLOTKOV et al.
Icon394.png
Coronal heating models meet damped slow magnetoacoustic waves. Click the title to read more.
393 Self-Consistent Flare Model
2 November 2020 by Wenzhi RUAN and Rony KEPPENS
Icon393.png
Energy transport by fast particles made self-consistent with MHD flare modeling. Click the title to read more.
392 Hot Flare Onsets
26 October 2020 by Hugh HUDSON et al.
Icon392.png
The initial soft X-ray temperatures of solar flares tend to be in the 10-15 MK range. Click the title to read more.
391 Electric Current Neutralization and Eruption
19 October 2020 by Ellis AVALLONE and Xudong SUN
Icon391.png
Coronal currents without neutralizing return currents appear to. Click the title to read more.
390 Prediction of Solar Cycle 25
5 October 2020 by Leif SVALGAARD
Icon390.png
Now we know how big the next solar maximum will be. Click the title to read more.
389 Flare/CME Cartoon Archive
27 September 2020 by Hugh HUDSON
Icon389.png
A new edition of the Flare/CME archive, nearly a half kilotoon now. Click the title to read more.
388 Submerged Flare Acoustic Sources
13 September 2020 by Juan Camilo BUITRAGO CASAS and Angel MARTÍNEZ
Icon388.png
Flare acoustic radiation emanates from a source _inside_ the Sun. Click the title to read more.
387 Circular Ribbon Flare at Microwaves
31 August 2020 by Jeongwoo LEE
Icon387.png
Breakout reconnection reveals itself via microwave polarization measurements.. Click the title to read more.
386 Relation of Non-neutralized electric currents and the activity in active regions
24 August 2020 by P. VEMAREDDY
Icon386.png
Non-neutralized coronal current systems contribute to CME eruptions. Click the title to read more.
385 White-light emission and photospheric magnetic field changes in flares
17 August 2020 by J. Sebastián CASTELLANOS DURÁN and Lucia KLEINT
Icon385.png
There are strong correlations between white-light flare emissions and line-of-sight magnetic field changes. Click the title to read more.
384 Sunspot Differential Rotation in an X-class Flare
10 August 2020 by Richard GRIMES, Balázs PINTÉR and Huw MORGAN
Icon384.png
Observations suggesting how the coronal tail can wag the photospheric dog. Click the title to read more.
383 Energy Partitioning in a Nonthermally Dominated Two-loop Solar Flare
3 August 2020 by Galina MOTORINA et al.
Icon383.png
Modeling the propagation of energy via GX Simulator in an early-impulsive flare. Click the title to read more.
382 SOL2013-11-10 Eruptive Circular-ribbon Flare with Extended Remote Brightenings
31 July 2020 by Chang LIU et al.
Icon382.png
A circular-ribbon event can launch an eruption by breaking through its separatrix dome. Click the title to read more.
381 Extreme-Ultraviolet Late Phase of Solar Flares
22 June 2020 by Rui LIU
Icon381.png
Both arcade and circular-ribbon flares may sometimes spawn EUV late phase emission. Click the title to read more.
380 Energy transport by accelerated particles in the quiet solar atmosphere
15 June 2020 by Lars FROGNER, Boris GUDIKSEN and Helle BAKKE
Icon380.png
A first study of non-thermal particles integrated into an MHD simulation of the solar atmosphere. Click the title to read more.
379 Quasi-periodic pulsations as indicators of oscillatory processes in solar flares
11 May 2020 by Elena KUPRIYANOVA et al.
Icon379.png
Many, many QPPs. Click the title to read more.
378 Rejuvenating Solar Flare Termination Shocks as Particle Accelerators
4 May 2020 by Bin CHEN
Icon378.png
At last, clear evidence for a long-predicted phenomenon. Click the title to read more.
377 Broad symmetrical Doppler-shifted Fe XXI line profiles
20 April 2020 by Vanessa POLITO
Icon377.png
It is difficult to explain "evaporation" line profiles by superposition of unresolved flows. Click the title to read more.
376 Phenomena in the unusually long pre-impulsive phase of SOL2011-06-07
13 April 2020 by Marian KARLICKÝ, Jana KAŠPAROVÁ, and Robert SYCH
Icon376.png
A massive and slowly-rising filament eruption reveals important new signatures of the physics. Click the title to read more.
375 Evidence for a Coronal Shock Wave Origin for Relativistic Protons Producing Solar Gamma-Rays and Observed by Neutron Monitors at Earth‎
6 April 2020 by Athanasios KOULOUMVAKOS and Gerry SHARE
Icon375.png
Successful modeling of prolonged solar gamma-ray emissions and terrestrial ground-level cosmic-ray events. Click the title to read more.
374 Using overlappogram data to find hot flare plasma
23 March 2020 by Louise HARRA
Icon374.png
Imaging Fe XXIV at high resolution with the EIS slot data. Click the title to read more.
373 SOL2017-09-04 (M5.5) 2017 as a Source of Relativistic Electrons and Protons
16 March 2020 by Alexei STRUMINSKII
Icon373.png
Flare-accelerated particles, rather than SEPs, energize sustained gamma-ray emission. Click the title to read more.
372 Heating of the solar photosphere during a white-light flare‎
2 March 2020 by Jan JURČÁK
Icon372.png
The best-ever spectrum of the flare photosphere. Click the title to read more.
371 A Hot Cusp-Shaped Confined Solar Flare
24 February 2020 by Aaron HERNANDEZ-PEREZ
Icon371.png
A flare may have a prominent hot cusp with the help of any eruption. Click the title to read more.
370 The Temporal and Spatial Extension of Gamma-ray Emission from the Sun
17 February 2020 by Nat GOPALSWAMY
Icon370.ng.png
Sustained solar γ-rays and solar cosmic rays. Click the title to read more.
369 A PSP Perihelion
20 January 2020 by Jessie DUNCAN and Hugh Hudson
Icon369.png
The Parker Solar Probe enters its fourth perihelion already. Now. Click the title to read more.
368 Remembering John Brown
13 January 2020 by Alec MacKINNON
Icon368.png
John passed away unexpectedly on 16 November 2019. Click the title to read more.
367 A Global Survey of EUV Coronal Power Spectra
30 December 2019 by Karl Battams
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Time-series parameter maps of imaged power spectra from an AIA pipeline. Click the title to read more.
366 Cosmic Rays over the Rainbow Bridge
16 December 2019 by Hugh Hudson Alec MacKinnon
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Cosmic rays approach the Sun. Click the title to read more.
365 Spectropolarimetric Insight into Plasma-Sheet Dynamics of a Solar Flare
9 December 2019 by Ryan French
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CoMP polarization patterns in SOL2017-09-10 are amazing. Click the title to read more.
364 Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares‎
18 November 2019 by Ranadeep Sarkar, Nandita Srivastava and Astrid Veronig
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The net Lorentz force clearly exhibits a build-up and release pattern. Click the title to read more.
363 Flare waiting times depend on their magnitudes
11 November 2019 by Hugh Hudson
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Surprising new evidence for the flare build-up and release process. Click the title to read more.
362 Can magnetic reconnection cause solar rainstorms?‎
4 November 2019 by Petra Kohutova
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Impulsive coronal heating resulting from reconnection can trigger coronal rain. Click the title to read more.
361 Non-radial jets on the edges of active regions
14 October 2019 by Peter Wyper
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The very common jet structures we see can naturally combine twist and breakout. Click the title to read more.
360 Searching SOLfully within the Nuggets
7 October 2019 by Hugh Hudson
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The IAU target identifier works well for finding items about a particular event. Click the title to read more.
359 Submillimeter Radiation as the Thermal Component of the Neupert Effect
31 September 2019 by Guillermo Giménez de Castro
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Flare radiation at the highest frequencies can be bremsstrahlung. Click the title to read more.
358 The "Last Best" Flares
24 September 2019 by Hugh Hudson, Ed Cliver, and Brian Dennis
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Major flares tend to happen at the very ends of sunspot cycles. Click the title to read more.
357 Dynamic Processes of the Moreton Wave on 2014 March 29‎
16 September 2019 by Denis Cabezas and the FMT team
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A beautiful Moreton wave excited by the best-observed flare ever. Click the title to read more.
356 EVE-RHESSI DEM Models and the Low-energy Cutoff for Nonthermal Electrons
9 September 2019 by Jim McTiernan
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Characterizing flare temperature distributions helps to define the non-thermal energy release. Click the title to read more.
355 Stealth Coronal Mass Ejections from Active Regions
26 August 2019 by Jennifer O'Kane
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Perhaps just feeble versions of the same magnetic disease.... Click the title to read more.
354 Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?‎
15 July 2019 by Yuta NOTSU
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Kepler superflares hint at solar superflares. Click the title to read more.
353 Localized Microwave and EUV Bright Structures in an Eruptive Prominence
22 June 2019 by Jing HUANG
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Detailed correlations between EUV and microwaves in prominence fine structures. Click the title to read more.
352 Broken-up hard X-ray spectra found for a loop-top source during a solar limb flare
16 June 2019 by Hao NING, Yao CHEN and Jeongwoo LEE
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SOL2017-09-10 coronal hard X-ray sources. Click the title to read more.
351 The Cosmic-Ray Shadow and Coronal Magnetism
27 May 2019 by Frederik Tenholt
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The coronal magnetic field measured in Antarctica. Click the title to read more.
350 Kristian Birkeland
6 May 2019 by Hugh HUDSON and Lyndsay FLETCHER
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Space weather a century ago: Kristian Birkeland. Click the title to read more.
349 Warm UV loops heated by small-scale cancellation events
22 April 2019 by Seray ŞAHIN and Vasyl YURCHYSHYN
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Precisely locating the footpoints of warm coronal loops helps identify their source(s) of excitation. Click the title to read more.
348 Multiple Regions of Shock-accelerated Particles during a Solar Coronal Mass Ejection
1 April 2019 by Diana MOROSAN
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LOFAR identifies herringbone sources within the flank of the SOL2017-09-10 shock - no joke. Click the title to read more.
347 Persistent Quasi-Periodic Pulsations Detected During the Large X8.2 Solar Flare
25 March 2019 by Laura HAYES and Peter GALLAGHER
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The most beautiful flare has the most beautiful pulsations. Click the title to read more.
346 Is the coronal magnetic field braiding?
11 March 2019 by Markus ASCHWANDEN
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This iconic cartoon does not relate well to the observations. Click the title to read more.
345 An energetic pre-flare: electron distributions in magnetic reconnection outflows
18 February 2019 by Marina BATTAGLIA, Eduard KONTAR and Galina MOTORINA
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Assessing energy partition in a pre-impulsive flare development. Click the title to read more.
344 Linear Polarization in H-alpha Flares
4 February 2019 by Tomoko KAWATE and Yoichiro HANAOKA
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H-alpha polarization is rarely observable but, in once case, very suggestive. Click the title to read more.
343 Short-Period Waves
21 January 2019 by Sijie YU and Bin CHEN
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New decimetric imaging spectroscopy suggests Alfvénic energy transport in flares. Click the title to read more.
342 The Interesting RHESSI/SAS Archive
8 January 2019 by Hugh HUDSON and Martin FIVIAN
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The full mission database shows RHESSI to have been very stable geometrically. Click the title to read more.
341 Homologous White Light Solar Flares‎
31 December 2018 by Paolo ROMANO and Abouazza ELMHAMDI
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Homologous white-light flares, in rapid succession, and coronal null points. Click the title to read more.
340 The flight of FOXSI-3
10 December 2018 by Lindsay GLESENER and Noriyuki NARUKAGE
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Single-photon counting and direct focusing across hard and soft energies. Click the title to read more.
339 Stellar Flares and Starspots
3 December 2018 by Lauren DOYLE
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Stellar flares don't spatially match their starspots. Click the title to read more.
338 Neutron Production in Solar Flares
26 November 2018 by Ron MURPHY and Gerry SHARE
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Neutron astronomy helps us understand solar flares. Click the title to read more.
337 Cycle 25 Strikes Again
20 November 2018 by Kamil BICZ
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A second, larger Cycle 25 sunspot. Click the title to read more.
336 Remembering Marcos Machado via his research
13 November 2018 by Hugh HUDSON
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Recalling a friend and colleague, and admiring his final paper. Click the title to read more.
335 CORONAS/SPIRIT Mg XII and Nanoflares‎
22 October 2018 by Anton REVA
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Monochromatic Mg XII spectroheliography sets severe limits on nanoflare heating models. Click the title to read more.
334 White-light Emission and Non-thermal Electrons‎
8 October 2018 by Kyoung-Sun LEE
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An intimate relationship between accelerated electrons and visible flare continuum. Click the title to read more.
333 Coronal Hard X-ray Sources Revisited
24 September 2018 by Brian DENNIS
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Reporting some over-interpretation of the evidence for "coronal thick targets". Click the title to read more.
332 Photospheric response to a flare
17 September 2018 by Mike WHEATLAND
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Sudden changes in the magnetic field in the low atmosphere associated with particle acceleration. Click the title to read more.
331 New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles
27 August 2018 by David WEBB
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A digital archive of Pat McIntosh's 44 years of solar synoptic observations. Click the title to read more.
330 Understanding the co-spatial return current in solar flares
6 August 2018 by Meriem ALAOUI and Gordon HOLMAN
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Completing the circuit in a thick-target model. Click the title to read more.
329 3D Magnetic Reconnection at a Coronal Null Point
30 July 2018 by Shane MALONEY, Aidan O'Flannagain and Peter Gallagher
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Large-scale reconnection involved in Type I radio noise storm. Click the title to read more.
328 The true dawn of multimessenger astronomy
23 July 2018 by Hugh Hudson
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Ever since the Carrington flare. Click the title to read more.
327 Microwave Imaging Spectroscopy of Flares is Here‎
16 July 2018 by Dale E. Gary, EOVSA and RHESSI Teams
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Microwave imaging spectroscopy takes a giant leap forward with SOL2017-09-10. Click the title to read more.
326 Coronal nanoflares powered by footpoint reconnection
9 July 2018 by Pradeep Chitta, Hardi Peter, and Sami Solanki
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Coronal nanoflares in active region cores can be powered by the magnetic reconnection in the lower solar atmosphere. Click the title to read more.
325 A remarkable, but confused, coronal hard X-ray source
25 June 2018 by Alexandra Lysenko, Larisa Kashapova and Hugh Hudson
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A remarkable flare in 1999 adds to our short list of extended coronal hard X-ray/microwave sources. Click the title to read more.
324 Understanding HMI pseudocontinuum in white-light flares‎
28 May 2018 by Michal Švanda et al.
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The HMI pseudocontinuum (Ic) is ill-calibrated in regions with strong fields, i.e. for white-light flares. Click the title to read more.
323 To beam or not to beam - that is (still) the question
14 May 2018 by Paulo Simões and Hugh Hudson
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Descriptions of the lower solar atmosphere of flares ca. Cycle 21 sound surprisingly current. Click the title to read more.
322 Observation of Cosmic Ray Spallation Events from SoHO‎
7 May 2018 by Serge Koutchmy and Ehsan Tavabi
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LASCO's images capture high-energy nuclear interactions from cosmic-ray hits. Click the title to read more.
321 A Sunspot from Cycle 25 for sure
10 April 2018 by Tomek Mrozek and Hugh Hudson
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YES! Cycle 25 is here!. Click the title to read more.
320 Blue-wing enhancement of the Mg II h and k lines in a flare
9 April 2018 by Akiko TEI
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Flare loops involve a cool upflow preceding the hot evaporation flow. Click the title to read more.
319 NuSTAR detects X-ray flares in the quiet Sun
26 March 2018 by Matej Kuhar and Säm Krucker
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Quiet-Sun flares may not be powerful, but they look a lot like ordinary flares. Click the title to read more.
318 Homologous CME/flares from AR 12371
19 March 2018 by Panditi Vemareddy and Pascal Demoulín
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An excellent set of homologous flare/CMEs analyzed and explained. Click the title to read more.
317 Non-Maxwellian Diagnostics from SDO/EVE Spectra of an X-class Flare
16 February 2018 by Elena Dzifčáková and Jaroslav Dudík
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Ratios of high-excitation ions can readily detect κ-distributions in flare plasmas. Click the title to read more.
316 Joint MinXSS and RHESSI Flare X-ray Spectra between 1 and 15 keV
5 February 2018 by Chris Moore, Brian Dennis and the MinXSS Science Team
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MinXSS adds systematic views of flare soft X-ray spectra to RHESSI imagery. Click the title to read more.
315 Parameterized Flare Models with Chromospheric Compressions
17 January 2018 by Adam Kowalski & Joel Allred
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A new approach to modeling the lower flare atmosphere. Click the title to read more.
314 A Curious Sunspot Group in 2018
14 January 2018 by Hugh Hudson
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The first new sunspot group of 2018 emerged at the wrong latitude. Click the title to read more.
313 Tecumseh's Eclipse and Astrophysics
25 December 2017 by Hugh Hudson
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The solar corona was first recognized as such, and named, in an eclipse of 1806. Click the title to read more.
312 Hunting for Hidden Tiny Flares
27 November 2017 by Shin-nosuke ISHIKAWA
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FOXSI-2 says that episodic energy releases are still viable as a part of the coronal heating problem.. Click the title to read more.
311 Unusual Type III Burst Dynamics Produced by Diverging Magnetic Fields
20 November 2017 by Patrick McCauley
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Unusual type III bursts follow coronal separatrix structures.. Click the title to read more.
310 Valderrama in the 21st Century
31 October 2017 by Hugh Hudson
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A newly-described white-light flare from the 19th century!... Click the title to read more.
309 Electron Scattering in the Flaring Corona
24 October 2017 by Sophie Musset
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Diffusive transport may contribute to the trapping of electrons in coronal X-ray sources. Click the title to read more.
308 The Power of Turbulence
25 September 2017 by Nic Bian
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Turbulent energy content may underlie flare energy transfer, magnetic reconnection, and particle acceleration. Click the title to read more.
307 The Kelvin Force and Loop-Top Concentration
18 September 2017 by Kiyoto SHIBASAKI
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New physics can explain the perplexing overpressure at the flare looptop regions. Click the title to read more.
306 The Last Best Flare of Cycle 24?
11 September 2017 by Säm Krucker and Hugh Hudson
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Right on schedule, Cycle 24 has produced a great flare (with a GLE). Click the title to read more.
305 Electric Current Neutralization and Solar Eruption in Active Regions
28 August 2017 by Yang LIU
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Active current systems in the solar corona don't have return currents. Click the title to read more.
304 RHESSI and the Megamovie
31 July 2017 by Hugh Hudson, Laura Peticolas, and Juan Carlos Martínez Oliveros
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A wholly new way to view a solar eclipse, and to do solar astrometry. Click the title to read more.
303 Bastille Day 2017
24 July 2017 by Hugh Hudson and Säm Krucker
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Interesting flares really do happen on Bastille Day.... Click the title to read more.
302 The Solar X-ray Limb III
12 June 2017 by Marina Battaglia and Gordon Hurford
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RHESSI succeeds with a wholly new way to measure the solar diameter. Click the title to read more.
301 Double Coronal X-ray and Microwave Sources Associated With A Magnetic Breakout Solar Eruption
29 May 2017 by Yao CHEN
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A different explanation of the double coronal hard X-ray sources. Click the title to read more.
300 A Lasso Model for Solar Gamma-ray Events
15 May 2017 by Hugh Hudson
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A toy model hoping to explain the SEP/LAT relationship. Click the title to read more.

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