Solar flares on December 21, 2001
The most powerful solar flare in 24 hours
C4.0 (normal) flare - December 21 at 10:51 AM
Solar activity index
Value as of the end of the day on December 21, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2001 to December 21, 2001
Time zone — UTC+05:30 (Indore)
List of solar flares for December 21, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.1 | 19:08 | 19:11 | 19:15 | 9742 |
| C3.1 | 15:33 | 15:38 | 15:43 | 9742 |
| C4.0 | 10:46 | 10:51 | 10:57 | 9742 |
| C2.9 | 09:25 | 09:36 | 09:41 | 9742 |
| C3.1 | 08:54 | 08:58 | 09:02 | 9742 |
| C3.7 | 06:18 | 06:23 | 06:29 | — |
| C3.5 | 05:53 | 05:59 | 06:09 | 9742 |