Solar flares on December 13, 2025
The most powerful solar flare in 24 hours
C8.6 (normal) flare - December 13 at 4:21 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+05:30 (Chennai)
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 | 23:25 | 23:28 | 23:48 | 4304 |
| C2.1 | 22:48 | 23:12 | 23:24 | — |
| C2.8 | 18:31 | 18:34 | 19:00 | 4304 |
| C8.6 | 16:06 | 16:21 | 16:32 | 4296 |
| C1.5 | 13:11 | 13:18 | 13:23 | 4308 |
| C1.6 | 09:41 | 09:51 | 09:57 | 4299 |
| C1.6 | 09:26 | 09:29 | 09:32 | 4299 |
| C1.2 | 08:21 | 08:29 | 08:44 | 4296 |
| C1.1 | 07:34 | 07:41 | 07:47 | 4299 |
| C1.2 | 05:01 | 05:11 | 05:17 | 4307 |
| C1.3 | 03:41 | 03:48 | 03:54 | 4307 |