Solar flares on February 21, 2003
The most powerful solar flare in 24 hours
C4.3 (normal) flare - February 21 at 10:50 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+03 (Kaluga)
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 | 22:46 | 22:50 | 22:54 | 290 |
| C1.1 | 18:46 | 18:51 | 18:55 | — |
| C3.7 | 18:08 | 18:14 | 18:18 | 290 |
| C1.3 | 15:50 | 15:55 | 16:21 | 289 |
| C1.0 | 14:15 | 14:22 | 14:27 | — |
| C2.1 | 10:07 | 10:17 | 10:21 | — |
| C1.8 | 08:46 | 09:17 | 09:29 | 289 |
| C1.6 | 08:02 | 08:06 | 08:09 | 290 |
| C1.6 | 05:29 | 05:34 | 05:44 | — |
| C2.5 | 04:49 | 05:00 | 05:12 | — |