Solar flares on September 23, 2001
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 23 at 7:37 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-04 (Augusta) — summer time
List of solar flares for September 23, 2001
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.9 | 23:43 | 23:48 | 23:56 | — |
| C3.3 | 20:39 | 20:42 | 20:46 | — |
| C2.6 | 20:32 | 20:35 | 20:37 | 9628 |
| C3.3 | 19:18 | 19:23 | 19:27 | 9632 |
| C2.0 | 12:45 | 12:48 | 12:54 | — |
| C2.5 | 11:39 | 11:44 | 11:58 | 9628 |
| C6.5 | 10:17 | 10:26 | 10:39 | 9632 |
| C3.4 | 09:49 | 09:59 | 10:05 | 9632 |
| M1.1 | 07:31 | 07:37 | 07:43 | 9632 |
| C3.2 | 05:57 | 06:02 | 06:08 | 9628 |