Solar flares on February 21, 2002
The most powerful solar flare in 24 hours
M3.9 (strong) flare - February 21 at 1:26 PM
Solar activity index
Value as of the end of the day on February 21, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from February 20, 2002 to February 21, 2002
Time zone — UTC+01 (Bern)
List of solar flares for February 21, 2002
The total number of solar flares of class C and higher — 9 flares
C class — 6 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.9 | 23:05 | 23:15 | 23:24 | — |
| M1.4 | 21:28 | 21:37 | 21:47 | — |
| M1.0 | 19:07 | 19:23 | 19:44 | — |
| C3.5 | 17:45 | 17:48 | 17:50 | 9830 |
| M3.9 | 12:56 | 13:26 | 13:36 | — |
| C7.0 | 10:25 | 10:32 | 10:57 | 9825 |
| C5.6 | 08:06 | 08:57 | 09:46 | — |
| C3.6 | 05:41 | 05:48 | 06:10 | 9825 |
| C5.7 | 01:45 | 01:54 | 02:27 | — |