Solar flares on December 21, 2025
The most powerful solar flare in 24 hours
M1.3 (strong) flare - December 21 at 7:27 PM
Solar activity index
Value as of the end of the day on December 21, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2025 to December 21, 2025
Time zone — UTC+01 (Tirana)
List of solar flares for December 21, 2025
The total number of solar flares of class C and higher — 14 flares
C class — 13 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 23:28 | 23:34 | 23:37 | 4316 |
| C3.1 | 22:57 | 23:12 | 23:19 | 4316 |
| C6.2 | 21:51 | 22:01 | 22:07 | — |
| C4.0 | 21:16 | 21:24 | 21:32 | 4316 |
| C6.1 | 20:51 | 21:00 | 21:03 | — |
| C3.9 | 20:29 | 20:43 | 20:51 | 4316 |
| M1.3 | 19:12 | 19:27 | 19:36 | 4316 |
| C2.6 | 17:47 | 18:03 | 18:27 | 4316 |
| C1.4 | 16:52 | 16:58 | 17:05 | 4316 |
| C1.3 | 13:47 | 13:56 | 14:01 | 4315 |
| C1.3 | 13:11 | 13:23 | 13:29 | 4317 |
| C1.3 | 12:54 | 13:03 | 13:11 | 4316 |
| C1.8 | 03:14 | 03:24 | 03:32 | 4317 |
| C1.3 | 00:10 | 00:20 | 00:30 | 4317 |