Solar flares on December 11, 2025
The most powerful solar flare in 24 hours
C9.7 (normal) flare - December 11 at 4:46 PM
Solar activity index
Value as of the end of the day on December 11, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 10, 2025 to December 11, 2025
Time zone — UTC+01 (Prague)
List of solar flares for December 11, 2025
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.3 | 23:26 | 23:32 | 23:35 | 4294 |
| C1.8 | 22:35 | 22:46 | 22:53 | 4296 |
| C2.4 | 18:08 | 18:11 | 18:14 | 4294 |
| C9.7 | 16:39 | 16:46 | 16:51 | 4294 |
| C4.5 | 16:16 | 16:21 | 16:25 | 4294 |
| C2.3 | 13:06 | 13:12 | 13:14 | 4299 |
| C2.4 | 11:16 | 11:22 | 11:38 | 4294 |
| C5.0 | 10:34 | 10:38 | 10:40 | 4299 |
| C2.4 | 10:19 | 10:29 | 10:32 | 4294 |
| C1.7 | 07:09 | 07:15 | 07:18 | — |
| C2.0 | 03:48 | 03:51 | 03:55 | 4294 |
| C4.8 | 23:58 | 00:05 | 00:07 | 4294 |