Solar flares on December 12, 2025
The most powerful solar flare in 24 hours
C3.5 (normal) flare - December 12 at 8:58 AM
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 (Cheyenne)
List of solar flares for December 12, 2025
The total number of solar flares of class C and higher — 11 flares
C class — 11 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 21:11 | 21:21 | 21:27 | 4299 |
| C1.6 | 20:56 | 20:59 | 21:02 | 4299 |
| C1.2 | 19:51 | 19:59 | 20:14 | 4296 |
| C1.1 | 19:04 | 19:11 | 19:17 | 4299 |
| C1.2 | 16:31 | 16:41 | 16:47 | 4307 |
| C1.3 | 15:11 | 15:18 | 15:24 | 4307 |
| C3.2 | 10:22 | 10:57 | 11:29 | 4294 |
| C3.5 | 08:43 | 08:58 | 09:12 | 4294 |
| C2.8 | 07:37 | 07:47 | 07:51 | 4296 |
| C2.2 | 06:43 | 06:48 | 06:52 | 4294 |
| C2.6 | 02:10 | 02:19 | 02:29 | 4294 |