Solar flares on August 21, 2002
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - August 21 at 12:34 PM
Solar activity index
Value as of the end of the day on August 21, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2002 to August 21, 2002
Time zone — UTC+07 (Norilsk)
List of solar flares for August 21, 2002
The total number of solar flares of class C and higher — 16 flares
C class — 13 | M class — 2 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 23:09 | 23:12 | 23:14 | 69 |
| C2.5 | 20:49 | 20:53 | 20:59 | — |
| C3.1 | 19:58 | 20:03 | 20:09 | 69 |
| C3.3 | 19:45 | 19:48 | 19:51 | 69 |
| X1.0 | 12:28 | 12:34 | 12:36 | 69 |
| C3.6 | 11:47 | 11:51 | 11:54 | 83 |
| M1.4 | 08:35 | 08:41 | 08:45 | 69 |
| C3.3 | 07:57 | 08:01 | 08:06 | 69 |
| C6.4 | 06:08 | 06:13 | 06:17 | 69 |
| C5.4 | 05:42 | 05:45 | 05:47 | 69 |
| C6.2 | 05:21 | 05:28 | 05:30 | 69 |
| C3.5 | 05:06 | 05:11 | 05:13 | — |
| M1.2 | 03:53 | 04:14 | 04:24 | 85 |
| C3.3 | 01:21 | 01:28 | 01:38 | 69 |
| C9.9 | 00:34 | 00:55 | 01:00 | 69 |
| C5.2 | 23:55 | 00:06 | 00:11 | 69 |