Solar flares on August 21, 2002
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - August 21 at 11:04 AM
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+05:30 (Pune)
List of solar flares for August 21, 2002
The total number of solar flares of class C and higher — 15 flares
C class — 12 | M class — 2 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.8 | 22:50 | 22:55 | 22:57 | 69 |
| C3.6 | 22:28 | 22:32 | 22:41 | 69 |
| C3.0 | 21:39 | 21:42 | 21:44 | 69 |
| C2.5 | 19:19 | 19:23 | 19:29 | — |
| C3.1 | 18:28 | 18:33 | 18:39 | 69 |
| C3.3 | 18:15 | 18:18 | 18:21 | 69 |
| X1.0 | 10:58 | 11:04 | 11:06 | 69 |
| C3.6 | 10:17 | 10:21 | 10:24 | 83 |
| M1.4 | 07:05 | 07:11 | 07:15 | 69 |
| C3.3 | 06:27 | 06:31 | 06:36 | 69 |
| C6.4 | 04:38 | 04:43 | 04:47 | 69 |
| C5.4 | 04:12 | 04:15 | 04:17 | 69 |
| C6.2 | 03:51 | 03:58 | 04:00 | 69 |
| C3.5 | 03:36 | 03:41 | 03:43 | — |
| M1.2 | 02:23 | 02:44 | 02:54 | 85 |