Solar flares on December 21, 2024
The most powerful solar flare in 24 hours
M1.9 (strong) flare - December 21 at 12:38 AM
Solar activity index
Value as of the end of the day on December 21, 2024
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2024 to December 21, 2024
Time zone — UTC+00
List of solar flares for December 21, 2024
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.5 | 22:58 | 23:05 | 23:10 | 3932 |
| C6.7 | 21:59 | 22:08 | 22:16 | 3930 |
| C5.0 | 21:05 | 21:14 | 21:23 | 3928 |
| C8.3 | 20:30 | 20:37 | 20:47 | 3927 |
| C4.9 | 20:12 | 20:19 | 20:28 | 3930 |
| C3.6 | 11:28 | 11:32 | 11:36 | 3932 |
| C4.5 | 07:29 | 07:36 | 07:43 | 3932 |
| C3.3 | 07:16 | 07:24 | 07:29 | 3927 |
| C5.2 | 04:08 | 04:13 | 04:17 | 3932 |
| M1.9 | 00:33 | 00:38 | 00:42 | 3932 |