Solar flares on September 29, 2025
The most powerful solar flare in 24 hours
M1.2 (strong) flare - September 29 at 5:56 PM
Solar activity index
Value as of the end of the day on September 29, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 28, 2025 to September 29, 2025
Time zone — UTC-07 (Prince george) — summer time
List of solar flares for September 29, 2025
The total number of solar flares of class C and higher — 21 flares
C class — 17 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.6 | 21:43 | 21:46 | 21:48 | 4236 |
| C3.8 | 21:29 | 21:37 | 21:43 | 4236 |
| C5.8 | 19:00 | 19:14 | 19:27 | — |
| M1.2 | 17:51 | 17:56 | 17:58 | 4232 |
| C3.0 | 17:19 | 17:23 | 17:34 | 4230 |
| C3.8 | 15:44 | 15:50 | 15:53 | 4232 |
| C3.5 | 13:27 | 13:32 | 13:37 | 4232 |
| C3.9 | 13:06 | 13:11 | 13:16 | 4236 |
| C3.0 | 10:12 | 10:17 | 10:20 | 4233 |
| C3.0 | 09:55 | 10:04 | 10:12 | 4236 |
| C3.3 | 09:30 | 09:38 | 09:43 | 4236 |
| C2.5 | 08:50 | 08:55 | 09:01 | 4227 |
| C3.4 | 07:37 | 07:42 | 07:46 | 4236 |
| C4.3 | 07:17 | 07:25 | 07:31 | 4236 |
| C8.3 | 05:14 | 05:18 | 05:22 | 4230 |
| M1.0 | 04:56 | 04:59 | 05:02 | 4233 |
| M1.1 | 04:23 | 04:39 | 04:52 | 4232 |
| M1.0 | 04:06 | 04:15 | 04:18 | 4236 |
| C3.0 | 02:09 | 02:15 | 02:23 | — |
| C3.6 | 00:54 | 01:02 | 01:09 | 4236 |
| C3.9 | 00:12 | 00:22 | 00:33 | 4233 |