Solar flares on September 23, 2001
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 23 at 11:37 AM
Solar activity index
Value as of the end of the day on September 23, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 22, 2001 to September 23, 2001
Time zone — UTC+00
List of solar flares for September 23, 2001
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.3 | 23:18 | 23:23 | 23:27 | 9632 |
| C2.0 | 16:45 | 16:48 | 16:54 | — |
| C2.5 | 15:39 | 15:44 | 15:58 | 9628 |
| C6.5 | 14:17 | 14:26 | 14:39 | 9632 |
| C3.4 | 13:49 | 13:59 | 14:05 | 9632 |
| M1.1 | 11:31 | 11:37 | 11:43 | 9632 |
| C3.2 | 09:57 | 10:02 | 10:08 | 9628 |
| C4.4 | 01:02 | 01:06 | 01:08 | 9622 |