Solar flares on January 21, 2011
The most powerful solar flare in 24 hours
C3.3 (normal) flare - January 21 at 4:17 AM
Solar activity index
Value as of the end of the day on January 21, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 20, 2011 to January 21, 2011
Time zone — UTC+00 (London)
List of solar flares for January 21, 2011
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 20:14 | 20:31 | 20:39 | 1149 |
| C1.1 | 18:57 | 19:10 | 19:30 | — |
| C2.2 | 16:38 | 17:12 | 17:17 | 1149 |
| C1.1 | 15:17 | 15:21 | 15:25 | 1147 |
| C1.4 | 14:24 | 14:38 | 14:49 | 1149 |
| C1.0 | 12:05 | 12:15 | 12:20 | 1149 |
| C3.3 | 04:12 | 04:17 | 04:20 | 1149 |