Figure caption: Images of AR10720 before and during the X2.6-class flare of 2005 January 15. Frame (a): preflare continuum intensity. White contours show the location of hard X-ray emission during the impulsive phase of the flare, at 00:42 UT. The location of the hard X-ray emission is referenced by an oblique arrow that is reproduced in the same position in all frames. Frame (b): preflare line-of-sight MDI magnetogram. Frame (c) line-of-sight Doppler velocity during impulsive phase of the flare. Postive values (brighter) indicate downward motion. Frame (d): line-of-sight Doppler velocity at 01:03 UT, 21 minutes after the impulsive phase. Upper arrow locates nearly parallel ripples propagating northward away from the site of the initial disturbance. Frame (e): the continuum intensity transient. This is the intensity measured by the Global Oscillations Network Group (GONG) at 00:42 UT subtracted from the preflare intensity at 00:40 UT. Frame (f): 6 mHz egression power map of the flaring region, integrated over an 8-minute period centered at 00:42 UT. This is a holographic extrapolation of the ripples seen in Frame (d) back in time to their source.