Solar flares on September 13, 2025
The most powerful solar flare in 24 hours
C1.5 (normal) flare - September 13 at 2:14 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-06 (Cheyenne) — summer time
List of solar flares for September 13, 2025
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 23:48 | 23:54 | 23:56 | 4216 |
| C1.1 | 23:24 | 23:27 | 23:38 | 4216 |
| C1.1 | 16:32 | 16:43 | 17:15 | 4211 |
| C1.2 | 15:47 | 16:06 | 16:23 | — |
| C1.2 | 12:57 | 13:05 | 13:12 | — |
| C1.5 | 01:33 | 02:14 | 02:44 | 4207 |