Solar flares on December 20, 2021
The most powerful solar flare in 24 hours
M1.8 (strong) flare - December 20 at 5:06 PM
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+05:30 (Lucknow)
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 |
|---|---|---|---|---|
| C1.5 | 23:02 | 23:05 | 23:09 | — |
| C1.4 | 22:45 | 22:58 | 23:02 | — |
| C1.0 | 22:04 | 22:12 | 22:32 | 2907 |
| C1.4 | 21:27 | 21:32 | 21:36 | 2907 |
| C1.4 | 19:18 | 19:24 | 19:29 | 2907 |
| M1.8 | 16:42 | 17:06 | 17:25 | 2908 |
| C2.9 | 16:07 | 16:16 | 16:20 | 2907 |
| C1.1 | 14:49 | 14:51 | 14:55 | 2907 |
| C1.2 | 14:13 | 14:21 | 14:27 | 2907 |
| C1.3 | 12:03 | 12:10 | 12:14 | 2907 |
| C1.5 | 09:59 | 10:07 | 10:14 | 2908 |
| C4.4 | 08:38 | 08:51 | 08:57 | 2909 |
| C1.6 | 05:47 | 06:04 | 06:23 | 2908 |
| C3.7 | 02:29 | 02:42 | 02:57 | 2907 |
| C1.8 | 00:34 | 00:46 | 00:58 | 2907 |