Solar flares on September 25, 2025
The most powerful solar flare in 24 hours
M1.6 (strong) flare - September 25 at 4:43 AM
Solar activity index
Value as of the end of the day on September 25, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 24, 2025 to September 25, 2025
Time zone — UTC+09:30 (Adelaide)
List of solar flares for September 25, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.4 | 23:24 | 23:31 | 23:35 | 4217 |
| C1.9 | 22:12 | 22:21 | 22:27 | — |
| C2.1 | 21:56 | 22:03 | 22:12 | — |
| C2.3 | 19:59 | 20:07 | 20:24 | 4217 |
| C3.3 | 15:40 | 15:53 | 16:11 | 4224 |
| C3.6 | 13:30 | 13:39 | 13:46 | 4224 |
| C3.2 | 11:44 | 11:53 | 12:00 | 4224 |
| C4.6 | 08:44 | 08:52 | 08:59 | 4226 |
| M1.6 | 04:27 | 04:43 | 04:52 | 4224 |
| C2.4 | 02:24 | 02:33 | 02:43 | 4229 |