Solar flares on September 23, 2001
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 23 at 2:37 PM
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+03 (Athens)
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 |
|---|---|---|---|---|
| C2.0 | 19:45 | 19:48 | 19:54 | — |
| C2.5 | 18:39 | 18:44 | 18:58 | 9628 |
| C6.5 | 17:17 | 17:26 | 17:39 | 9632 |
| C3.4 | 16:49 | 16:59 | 17:05 | 9632 |
| M1.1 | 14:31 | 14:37 | 14:43 | 9632 |
| C3.2 | 12:57 | 13:02 | 13:08 | 9628 |
| C4.4 | 04:02 | 04:06 | 04:08 | 9622 |
| C3.7 | 01:01 | 01:07 | 01:18 | 9622 |