Solar flares on September 28, 2025
The most powerful solar flare in 24 hours
M6.4 (strong) flare - September 28 at 11:43 AM
Solar activity index
Value as of the end of the day on September 28, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 27, 2025 to September 28, 2025
Time zone — UTC+03 (Belgorod)
List of solar flares for September 28, 2025
The total number of solar flares of class C and higher — 14 flares
C class — 13 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.6 | 23:17 | 23:34 | 23:51 | 4233 |
| C7.4 | 22:37 | 22:56 | 23:01 | 4232 |
| C2.9 | 22:12 | 22:21 | 22:27 | 4236 |
| C3.7 | 20:35 | 20:42 | 20:46 | 4232 |
| C3.5 | 19:38 | 19:46 | 19:50 | — |
| C3.6 | 17:35 | 17:40 | 17:48 | 4233 |
| C9.9 | 16:26 | 16:31 | 16:34 | 4233 |
| C9.0 | 16:12 | 16:24 | 16:26 | 4233 |
| C3.2 | 15:46 | 15:55 | 16:03 | 4233 |
| C3.6 | 14:29 | 14:42 | 14:55 | 4233 |
| C3.0 | 13:48 | 13:54 | 13:56 | 4232 |
| M6.4 | 11:34 | 11:43 | 11:49 | 4232 |
| C2.3 | 10:02 | 10:07 | 10:25 | 4233 |
| C2.8 | 03:52 | 04:01 | 04:10 | 4233 |