Solar flares on October 20, 2001
The most powerful solar flare in 24 hours
C7.3 (normal) flare - October 20 at 12:28 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+00
List of solar flares for October 20, 2001
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.5 | 22:33 | 22:38 | 22:41 | 9674 |
| C3.3 | 22:04 | 22:11 | 22:13 | — |
| C3.0 | 21:44 | 21:47 | 21:54 | 9670 |
| C4.6 | 21:07 | 21:12 | 21:15 | 9674 |
| C4.1 | 07:00 | 07:09 | 07:25 | 9670 |
| C7.3 | 00:11 | 00:28 | 00:42 | — |