| Wilcox Solar Observatory (WSO) |
|
| National Solar Observatory SOLIS (NSO) |
|
| Mt. Wilson Observatory (MWO) |
|
| Realtime GONG magnetogram page at SSL, UCB. |
|
| SOHO/Michelson Doppler Imager (MDI) |
|
| Wilcox Solar Observatory (WSO) |
|
| National Solar Observatory SOLIS (NSO) |
|
| Mt. Wilson Observatory (MWO) |
|
| Realtime GONG magnetogram page at SSL, UCB. |
|
| SOHO/Michelson Doppler Imager (MDI) |
|