Solar flares on January 21, 2005
The most powerful solar flare in 24 hours
M1.7 (strong) flare - January 21 at 10:16 AM
Solar activity index
Value as of the end of the day on January 21, 2005
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 20, 2005 to January 21, 2005
Time zone — UTC+00
List of solar flares for January 21, 2005
The total number of solar flares of class C and higher — 11 flares
C class — 9 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 20:43 | 20:49 | 20:55 | 720 |
| C1.6 | 17:05 | 17:11 | 17:14 | 720 |
| M1.2 | 13:47 | 13:55 | 14:10 | 719 |
| C1.3 | 12:07 | 12:12 | 12:16 | 719 |
| M1.7 | 10:10 | 10:16 | 10:19 | 720 |
| C1.7 | 09:05 | 09:12 | 09:18 | 719 |
| C1.3 | 08:21 | 08:35 | 08:40 | 719 |
| C1.8 | 06:41 | 06:46 | 06:49 | 720 |
| C1.6 | 06:30 | 06:36 | 06:38 | 720 |
| C6.3 | 04:17 | 04:27 | 04:34 | 720 |
| C5.8 | 00:19 | 00:24 | 00:26 | 720 |