Solar flares on December 11, 2025
The most powerful solar flare in 24 hours
C9.7 (normal) flare - December 11 at 3:46 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+00
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 |
|---|---|---|---|---|
| C2.4 | 23:35 | 23:45 | 23:53 | 4305 |
| C2.3 | 22:26 | 22:32 | 22:35 | 4294 |
| C1.8 | 21:35 | 21:46 | 21:53 | 4296 |
| C2.4 | 17:08 | 17:11 | 17:14 | 4294 |
| C9.7 | 15:39 | 15:46 | 15:51 | 4294 |
| C4.5 | 15:16 | 15:21 | 15:25 | 4294 |
| C2.3 | 12:06 | 12:12 | 12:14 | 4299 |
| C2.4 | 10:16 | 10:22 | 10:38 | 4294 |
| C5.0 | 09:34 | 09:38 | 09:40 | 4299 |
| C2.4 | 09:19 | 09:29 | 09:32 | 4294 |
| C1.7 | 06:09 | 06:15 | 06:18 | — |
| C2.0 | 02:48 | 02:51 | 02:55 | 4294 |