Solar flares on February 21, 2002
The most powerful solar flare in 24 hours
M4.4 (strong) flare - February 21 at 7:10 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-05 (Augusta)
List of solar flares for February 21, 2002
The total number of solar flares of class C and higher — 9 flares
C class — 5 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.0 | 21:13 | 21:29 | 21:40 | — |
| M4.4 | 18:49 | 19:10 | 19:27 | 9830 |
| C3.9 | 17:05 | 17:15 | 17:24 | — |
| M1.4 | 15:28 | 15:37 | 15:47 | — |
| M1.0 | 13:07 | 13:23 | 13:44 | — |
| C3.5 | 11:45 | 11:48 | 11:50 | 9830 |
| M3.9 | 06:56 | 07:26 | 07:36 | — |
| C7.0 | 04:25 | 04:32 | 04:57 | 9825 |
| C5.6 | 02:06 | 02:57 | 03:46 | — |