Solar flares on December 21, 2021
The most powerful solar flare in 24 hours
M1.4 (strong) flare - December 21 at 2:44 PM
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+03 (Oryol)
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 |
|---|---|---|---|---|
| C3.9 | 23:36 | 23:48 | 00:00 | — |
| C4.9 | 22:02 | 22:23 | 22:53 | 2909 |
| C4.9 | 20:35 | 20:50 | 21:04 | 2908 |
| C2.0 | 18:44 | 18:53 | 18:58 | 2916 |
| C1.0 | 16:45 | 16:52 | 17:00 | 2908 |
| M1.4 | 14:31 | 14:44 | 14:49 | 2916 |
| M1.1 | 10:43 | 10:50 | 10:57 | 2916 |
| C4.9 | 10:06 | 10:22 | 10:34 | 2908 |
| C4.0 | 08:58 | 09:10 | 09:19 | 2908 |
| C3.3 | 07:48 | 08:00 | 08:09 | 2908 |
| C2.8 | 06:40 | 06:44 | 06:52 | 2908 |
| C5.5 | 04:44 | 04:57 | 05:12 | 2907 |
| C1.1 | 01:47 | 01:54 | 02:04 | — |