Solar flares on December 20, 2021
The most powerful solar flare in 24 hours
M1.8 (strong) flare - December 20 at 6:36 AM
Solar activity index
Value as of the end of the day on December 20, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 19, 2021 to December 20, 2021
Time zone — UTC-05 (Providence)
List of solar flares for December 20, 2021
The total number of solar flares of class C and higher — 15 flares
C class — 14 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.8 | 22:40 | 22:44 | 22:52 | 2908 |
| C5.5 | 20:44 | 20:57 | 21:12 | 2907 |
| C1.1 | 17:47 | 17:54 | 18:04 | — |
| C1.6 | 15:45 | 15:49 | 15:55 | — |
| C1.4 | 15:23 | 15:32 | 15:41 | — |
| C1.5 | 12:32 | 12:35 | 12:39 | — |
| C1.4 | 12:15 | 12:28 | 12:32 | — |
| C1.0 | 11:34 | 11:42 | 12:02 | 2907 |
| C1.4 | 10:57 | 11:02 | 11:06 | 2907 |
| C1.4 | 08:48 | 08:54 | 08:59 | 2907 |
| M1.8 | 06:12 | 06:36 | 06:55 | 2908 |
| C2.9 | 05:37 | 05:46 | 05:50 | 2907 |
| C1.1 | 04:19 | 04:21 | 04:25 | 2907 |
| C1.2 | 03:43 | 03:51 | 03:57 | 2907 |
| C1.3 | 01:33 | 01:40 | 01:44 | 2907 |