Solar flares on February 21, 2003
The most powerful solar flare in 24 hours
C4.3 (normal) flare - February 21 at 7:50 PM
Solar activity index
Value as of the end of the day on February 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from February 20, 2003 to February 21, 2003
Time zone — UTC+00 (London)
List of solar flares for February 21, 2003
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.3 | 19:46 | 19:50 | 19:54 | 290 |
| C1.1 | 15:46 | 15:51 | 15:55 | — |
| C3.7 | 15:08 | 15:14 | 15:18 | 290 |
| C1.3 | 12:50 | 12:55 | 13:21 | 289 |
| C1.0 | 11:15 | 11:22 | 11:27 | — |
| C2.1 | 07:07 | 07:17 | 07:21 | — |
| C1.8 | 05:46 | 06:17 | 06:29 | 289 |
| C1.6 | 05:02 | 05:06 | 05:09 | 290 |
| C1.6 | 02:29 | 02:34 | 02:44 | — |
| C2.5 | 01:49 | 02:00 | 02:12 | — |