Solar flares on October 21, 2002
The most powerful solar flare in 24 hours
C6.3 (normal) flare - October 21 at 4:37 AM
Solar activity index
Value as of the end of the day on October 21, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2002 to October 21, 2002
Time zone — UTC+07 (Norilsk)
List of solar flares for October 21, 2002
The total number of solar flares of class C and higher — 11 flares
C class — 11 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 22:01 | 22:05 | 22:12 | 162 |
| C3.7 | 19:15 | 19:27 | 19:36 | 162 |
| C2.9 | 18:30 | 19:04 | 19:15 | — |
| C2.3 | 15:19 | 15:36 | 15:41 | 162 |
| C3.1 | 11:52 | 12:23 | 12:30 | 162 |
| C3.6 | 11:16 | 11:19 | 11:22 | 154 |
| C3.3 | 07:45 | 07:57 | 08:04 | 160 |
| C2.9 | 07:00 | 07:23 | 07:40 | — |
| C6.3 | 04:26 | 04:37 | 04:48 | — |
| C3.1 | 02:17 | 02:21 | 02:25 | 162 |
| C2.6 | 00:52 | 01:05 | 01:10 | 154 |