Solar flares on September 20, 2001
The most powerful solar flare in 24 hours
M1.5 (strong) flare - September 20 at 6:17 PM
Solar activity index
Value as of the end of the day on September 20, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2001 to September 20, 2001
Time zone — UTC+00
List of solar flares for September 20, 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 |
|---|---|---|---|---|
| C3.8 | 18:48 | 18:51 | 18:54 | 9628 |
| M1.5 | 18:12 | 18:17 | 18:21 | 9631 |
| C2.2 | 15:50 | 15:58 | 16:04 | — |
| C3.4 | 14:35 | 14:41 | 14:45 | — |
| C2.4 | 12:54 | 13:03 | 13:17 | — |
| C2.5 | 09:58 | 10:31 | 10:53 | — |
| C7.8 | 05:03 | 05:10 | 05:19 | 9628 |
| C3.4 | 02:24 | 02:32 | 02:36 | — |