Solar flares on January 21, 2001
The most powerful solar flare in 24 hours
M1.1 (strong) flare - January 21 at 11:12 PM
Solar activity index
Value as of the end of the day on January 21, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 20, 2001 to January 21, 2001
Time zone — UTC+00
List of solar flares for January 21, 2001
The total number of solar flares of class C and higher — 4 flares
C class — 3 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.1 | 23:08 | 23:12 | 23:19 | 9311 |
| C4.5 | 21:11 | 21:16 | 21:25 | 9311 |
| C3.0 | 19:17 | 19:28 | 19:39 | 9313 |
| C1.7 | 12:19 | 12:23 | 12:27 | — |