Solar flares on December 21, 2023
The most powerful solar flare in 24 hours
M4.2 (strong) flare - December 21 at 5:38 AM
Solar activity index
Value as of the end of the day on December 21, 2023
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2023 to December 21, 2023
Time zone — UTC+00
List of solar flares for December 21, 2023
The total number of solar flares of class C and higher — 12 flares
C class — 11 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.0 | 21:14 | 21:21 | 21:25 | 3529 |
| C2.0 | 20:22 | 20:30 | 20:40 | 3519 |
| C1.8 | 20:03 | 20:10 | 20:22 | 3519 |
| C4.1 | 19:03 | 19:07 | 19:12 | 3526 |
| C3.1 | 17:52 | 18:03 | 18:10 | 3519 |
| C2.1 | 16:16 | 16:25 | 16:36 | 3524 |
| C2.1 | 12:16 | 12:21 | 12:29 | 3528 |
| C2.2 | 10:15 | 10:25 | 10:29 | 3521 |
| C2.2 | 10:04 | 10:10 | 10:15 | 3521 |
| M4.2 | 05:19 | 05:38 | 05:49 | 3519 |
| C3.9 | 02:14 | 02:18 | 02:22 | 3529 |
| C5.4 | 00:01 | 00:06 | 00:10 | 3529 |