Solar flares on September 13, 2025
The most powerful solar flare in 24 hours
C1.5 (normal) flare - September 13 at 9:14 AM
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+01 (Dublin) — summer time
List of solar flares for September 13, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 23:32 | 23:43 | 00:15 | 4211 |
| C1.2 | 22:47 | 23:06 | 23:23 | — |
| C1.2 | 19:57 | 20:05 | 20:12 | — |
| C1.5 | 08:33 | 09:14 | 09:44 | 4207 |
| C1.1 | 06:03 | 06:09 | 06:19 | 4207 |
| C1.1 | 00:38 | 00:44 | 01:17 | 4213 |
| C1.4 | 23:49 | 00:00 | 00:12 | 4207 |