Solar flares on December 12, 2025
The most powerful solar flare in 24 hours
M2.0 (strong) flare - December 12 at 12:05 PM
Solar activity index
Value as of the end of the day on December 12, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 11, 2025 to December 12, 2025
Time zone — UTC+07 (Barnaul)
List of solar flares for December 12, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 8 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 22:43 | 22:58 | 23:12 | 4294 |
| C2.8 | 21:37 | 21:47 | 21:51 | 4296 |
| C2.2 | 20:43 | 20:48 | 20:52 | 4294 |
| C2.6 | 16:10 | 16:19 | 16:29 | 4294 |
| M1.1 | 12:27 | 12:44 | 12:53 | 4294 |
| M2.0 | 11:50 | 12:05 | 12:14 | 4296 |
| C2.4 | 06:35 | 06:45 | 06:53 | 4305 |
| C2.3 | 05:26 | 05:32 | 05:35 | 4294 |
| C1.8 | 04:35 | 04:46 | 04:53 | 4296 |
| C2.4 | 00:08 | 00:11 | 00:14 | 4294 |