Solar flares on September 13, 2025
The most powerful solar flare in 24 hours
C2.2 (normal) flare - September 13 at 10:50 PM
Solar activity index
Value as of the end of the day on September 13, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 12, 2025 to September 13, 2025
Time zone — UTC-08 (Dillingham) — summer time
List of solar flares for September 13, 2025
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 22:41 | 22:50 | 22:52 | 4216 |
| C1.7 | 22:02 | 22:11 | 22:16 | 4217 |
| C1.3 | 21:48 | 21:54 | 21:56 | 4216 |
| C1.1 | 21:24 | 21:27 | 21:38 | 4216 |
| C1.1 | 14:32 | 14:43 | 15:15 | 4211 |
| C1.2 | 13:47 | 14:06 | 14:23 | — |
| C1.2 | 10:57 | 11:05 | 11:12 | — |
| C1.5 | 23:33 | 00:14 | 00:44 | 4207 |