Solar flares on October 20, 2001
The most powerful solar flare in 24 hours
M3.3 (strong) flare - October 20 at 2:25 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+03 (Pskov)
List of solar flares for October 20, 2001
The total number of solar flares of class C and higher — 5 flares
C class — 4 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.1 | 10:00 | 10:09 | 10:25 | 9670 |
| C7.3 | 03:11 | 03:28 | 03:42 | — |
| M3.3 | 02:14 | 02:25 | 02:33 | 9658 |
| C3.9 | 00:36 | 01:02 | 01:09 | 9658 |
| C4.1 | 23:58 | 00:03 | 00:08 | 9658 |