Solar flares on September 20, 2001
The most powerful solar flare in 24 hours
C7.8 (normal) flare - September 20 at 12:10 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+07 (Barnaul)
List of solar flares for September 20, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 22:50 | 22:58 | 23:04 | — |
| C3.4 | 21:35 | 21:41 | 21:45 | — |
| C2.4 | 19:54 | 20:03 | 20:17 | — |
| C2.5 | 16:58 | 17:31 | 17:53 | — |
| C7.8 | 12:03 | 12:10 | 12:19 | 9628 |
| C3.4 | 09:24 | 09:32 | 09:36 | — |
| C7.5 | 01:45 | 01:52 | 02:00 | 9628 |