Solar flares on December 13, 2025
The most powerful solar flare in 24 hours
C8.6 (normal) flare - December 13 at 1:51 PM
Solar activity index
Value as of the end of the day on December 13, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 12, 2025 to December 13, 2025
Time zone — UTC+03 (Penza)
List of solar flares for December 13, 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 |
|---|---|---|---|---|
| C2.4 | 20:55 | 20:58 | 21:18 | 4304 |
| C2.1 | 20:18 | 20:42 | 20:54 | — |
| C2.8 | 16:01 | 16:04 | 16:30 | 4304 |
| C8.6 | 13:36 | 13:51 | 14:02 | 4296 |
| C1.5 | 10:41 | 10:48 | 10:53 | 4308 |
| C1.6 | 07:11 | 07:21 | 07:27 | 4299 |
| C1.6 | 06:56 | 06:59 | 07:02 | 4299 |
| C1.2 | 05:51 | 05:59 | 06:14 | 4296 |
| C1.1 | 05:04 | 05:11 | 05:17 | 4299 |
| C1.2 | 02:31 | 02:41 | 02:47 | 4307 |
| C1.3 | 01:11 | 01:18 | 01:24 | 4307 |