Solar flares on August 21, 2001
The most powerful solar flare in 24 hours
M1.5 (strong) flare - August 21 at 9:57 PM
Solar activity index
Value as of the end of the day on August 21, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2001 to August 21, 2001
Time zone — UTC+00
List of solar flares for August 21, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 6 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.5 | 21:51 | 21:57 | 22:00 | — |
| C1.9 | 20:52 | 20:57 | 21:02 | — |
| C2.7 | 10:35 | 13:03 | 14:34 | — |
| C1.6 | 07:21 | 07:48 | 08:13 | — |
| C1.9 | 03:31 | 03:37 | 03:46 | — |
| C1.3 | 01:56 | 02:00 | 02:06 | 9585 |
| C3.0 | 00:10 | 00:18 | 00:28 | — |