Solar flares on September 30, 2025
The most powerful solar flare in 24 hours
M2.7 (strong) flare - September 30 at 2:40 AM
Solar activity index
Value as of the end of the day on September 30, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 29, 2025 to September 30, 2025
Time zone — UTC-07 (Victoria) — summer time
List of solar flares for September 30, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 4 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.2 | 19:15 | 19:26 | 19:37 | 4232 |
| C7.8 | 18:15 | 18:30 | 18:54 | 4230 |
| C3.4 | 17:44 | 17:58 | 18:13 | — |
| C4.0 | 14:29 | 14:42 | 14:51 | 4226 |
| M1.8 | 05:02 | 05:27 | 05:48 | 4238 |
| M2.7 | 02:29 | 02:40 | 02:45 | 4226 |
| C2.8 | 02:15 | 02:21 | 02:24 | 4236 |