Solar flares on September 12, 2001
The most powerful solar flare in 24 hours
M1.0 (strong) flare - September 12 at 12:44 AM
Solar activity index
Value as of the end of the day on September 12, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 11, 2001 to September 12, 2001
Time zone — UTC-04 (Concord) — summer time
List of solar flares for September 12, 2001
The total number of solar flares of class C and higher — 11 flares
C class — 10 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.6 | 23:51 | 23:54 | 23:59 | 9608 |
| C6.6 | 22:00 | 22:07 | 22:17 | 9616 |
| C7.0 | 21:21 | 21:25 | 21:28 | — |
| C3.7 | 20:34 | 20:37 | 20:41 | — |
| C9.6 | 17:05 | 17:49 | 18:11 | — |
| C3.4 | 09:14 | 09:18 | 09:32 | — |
| C3.0 | 07:16 | 07:19 | 07:22 | — |
| C3.8 | 06:28 | 06:33 | 06:38 | — |
| C4.7 | 04:44 | 05:11 | 05:39 | — |
| C4.9 | 02:45 | 02:49 | 02:52 | 9608 |
| M1.0 | 00:35 | 00:44 | 00:52 | — |