Solar flares on January 20, 2001
The most powerful solar flare in 24 hours
M7.7 (strong) flare - January 20 at 9:20 PM
Solar activity index
Value as of the end of the day on January 20, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 19, 2001 to January 20, 2001
Time zone — UTC+00
List of solar flares for January 20, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 5 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M7.7 | 21:06 | 21:20 | 21:32 | 9313 |
| M1.2 | 18:33 | 18:47 | 18:59 | 9313 |
| C1.0 | 14:28 | 14:31 | 14:35 | — |
| C1.49 | 08:49 | 08:56 | 09:00 | — |
| C1.0 | 03:13 | 03:17 | 03:20 | — |
| C1.1 | 01:57 | 02:01 | 02:03 | — |
| C1.3 | 00:05 | 00:16 | 00:23 | — |