Solar flares on October 21, 2002
The most powerful solar flare in 24 hours
C6.6 (normal) flare - October 21 at 11:13 PM
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+02 (Brussels) — summer time
List of solar flares for October 21, 2002
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 |
|---|---|---|---|---|
| C6.6 | 23:01 | 23:13 | 23:24 | 160 |
| C2.0 | 22:04 | 22:08 | 22:17 | — |
| C1.7 | 17:01 | 17:05 | 17:12 | 162 |
| C3.7 | 14:15 | 14:27 | 14:36 | 162 |
| C2.9 | 13:30 | 14:04 | 14:15 | — |
| C2.3 | 10:19 | 10:36 | 10:41 | 162 |
| C3.1 | 06:52 | 07:23 | 07:30 | 162 |
| C3.6 | 06:16 | 06:19 | 06:22 | 154 |
| C3.3 | 02:45 | 02:57 | 03:04 | 160 |
| C2.9 | 02:00 | 02:23 | 02:40 | — |