Solar flares on October 20, 2001
The most powerful solar flare in 24 hours
M3.3 (strong) flare - October 20 at 1:25 AM
Solar activity index
Value as of the end of the day on October 20, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 19, 2001 to October 20, 2001
Time zone — UTC+02 (Belgrade) — summer time
List of solar flares for October 20, 2001
The total number of solar flares of class C and higher — 6 flares
C class — 5 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 23:44 | 23:47 | 23:54 | 9670 |
| C4.6 | 23:07 | 23:12 | 23:15 | 9674 |
| C4.1 | 09:00 | 09:09 | 09:25 | 9670 |
| C7.3 | 02:11 | 02:28 | 02:42 | — |
| M3.3 | 01:14 | 01:25 | 01:33 | 9658 |
| C3.9 | 23:36 | 00:02 | 00:09 | 9658 |