Solar flares on September 17, 2001
The most powerful solar flare in 24 hours
M8.1 (strong) flare - September 17 at 11:50 PM
Solar activity index
Value as of the end of the day on September 17, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 16, 2001 to September 17, 2001
Time zone — UTC+08 (Ulan-Ude)
List of solar flares for September 17, 2001
The total number of solar flares of class C and higher — 15 flares
C class — 13 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M8.1 | 23:44 | 23:50 | 23:54 | 9608 |
| C3.3 | 22:29 | 22:39 | 22:50 | — |
| C3.6 | 20:43 | 20:53 | 20:59 | — |
| C3.7 | 19:11 | 19:16 | 19:21 | — |
| C7.0 | 17:26 | 17:41 | 17:48 | 9621 |
| M1.5 | 16:18 | 16:25 | 16:34 | 9616 |
| C3.6 | 14:47 | 14:53 | 15:00 | 9608 |
| C4.4 | 13:42 | 13:46 | 13:49 | — |
| C4.9 | 12:29 | 13:02 | 13:23 | — |
| C3.9 | 10:04 | 10:07 | 10:10 | — |
| C4.1 | 07:47 | 07:50 | 07:55 | 9616 |
| C3.5 | 02:37 | 02:47 | 03:01 | 9616 |
| C4.8 | 01:06 | 01:12 | 01:19 | 9608 |
| C2.94 | 00:44 | 00:48 | 00:52 | 9608 |
| C3.1 | 00:04 | 00:10 | 00:18 | 9608 |