Solar flares on February 21, 2002
The most powerful solar flare in 24 hours
M4.4 (strong) flare - February 21 at 8:10 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-04 (Saint john)
List of solar flares for February 21, 2002
The total number of solar flares of class C and higher — 10 flares
C class — 6 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.0 | 22:13 | 22:29 | 22:40 | — |
| M4.4 | 19:49 | 20:10 | 20:27 | 9830 |
| C3.9 | 18:05 | 18:15 | 18:24 | — |
| M1.4 | 16:28 | 16:37 | 16:47 | — |
| M1.0 | 14:07 | 14:23 | 14:44 | — |
| C3.5 | 12:45 | 12:48 | 12:50 | 9830 |
| M3.9 | 07:56 | 08:26 | 08:36 | — |
| C7.0 | 05:25 | 05:32 | 05:57 | 9825 |
| C5.6 | 03:06 | 03:57 | 04:46 | — |
| C3.6 | 00:41 | 00:48 | 01:10 | 9825 |