Solar flares on September 11, 2001
The most powerful solar flare in 24 hours
M4.5 (strong) flare - September 11 at 9:36 PM
Solar activity index
Value as of the end of the day on September 11, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 10, 2001 to September 11, 2001
Time zone — UTC+01 (Dublin) — summer time
List of solar flares for September 11, 2001
The total number of solar flares of class C and higher — 13 flares
C class — 10 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.8 | 23:31 | 23:35 | 23:37 | 9610 |
| M4.5 | 21:25 | 21:36 | 21:43 | 9616 |
| C4.6 | 20:50 | 20:54 | 20:58 | — |
| C3.2 | 15:00 | 15:37 | 16:08 | 9615 |
| C2.9 | 13:30 | 13:33 | 13:35 | — |
| C3.3 | 10:47 | 10:51 | 10:55 | — |
| C9.7 | 10:33 | 10:37 | 10:39 | — |
| M1.2 | 07:53 | 08:04 | 08:22 | — |
| C5.1 | 04:32 | 04:49 | 05:05 | — |
| M2.6 | 01:49 | 02:11 | 02:23 | — |
| C9.5 | 01:28 | 01:33 | 01:37 | 9608 |
| C3.9 | 01:11 | 01:17 | 01:22 | 9608 |
| C3.6 | 00:45 | 00:48 | 00:51 | 9608 |