Solar flares on December 21, 2021
The most powerful solar flare in 24 hours
M1.4 (strong) flare - December 21 at 11:44 AM
Solar activity index
Value as of the end of the day on December 21, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2021 to December 21, 2021
Time zone — UTC+00
List of solar flares for December 21, 2021
The total number of solar flares of class C and higher — 13 flares
C class — 11 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.9 | 22:29 | 22:37 | 23:08 | — |
| C3.9 | 20:36 | 20:48 | 21:00 | — |
| C4.9 | 19:02 | 19:23 | 19:53 | 2909 |
| C4.9 | 17:35 | 17:50 | 18:04 | 2908 |
| C2.0 | 15:44 | 15:53 | 15:58 | 2916 |
| C1.0 | 13:45 | 13:52 | 14:00 | 2908 |
| M1.4 | 11:31 | 11:44 | 11:49 | 2916 |
| M1.1 | 07:43 | 07:50 | 07:57 | 2916 |
| C4.9 | 07:06 | 07:22 | 07:34 | 2908 |
| C4.0 | 05:58 | 06:10 | 06:19 | 2908 |
| C3.3 | 04:48 | 05:00 | 05:09 | 2908 |
| C2.8 | 03:40 | 03:44 | 03:52 | 2908 |
| C5.5 | 01:44 | 01:57 | 02:12 | 2907 |