Solar flares on September 27, 2025
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 27 at 1:14 AM
Solar activity index
Value as of the end of the day on September 27, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 26, 2025 to September 27, 2025
Time zone — UTC-06 (Fort Smith) — summer time
List of solar flares for September 27, 2025
The total number of solar flares of class C and higher — 16 flares
C class — 15 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.8 | 18:52 | 19:01 | 19:10 | 4233 |
| C3.1 | 14:53 | 14:58 | 15:03 | 4233 |
| C5.4 | 13:44 | 13:54 | 14:01 | 4232 |
| C7.6 | 11:51 | 11:56 | 11:59 | 4232 |
| C6.8 | 11:39 | 11:49 | 11:51 | 4232 |
| C3.1 | 10:45 | 10:49 | 10:51 | 4226 |
| C2.9 | 10:16 | 10:27 | 10:45 | 4233 |
| C2.0 | 09:08 | 09:15 | 09:21 | 4233 |
| C7.3 | 06:59 | 07:16 | 07:25 | 4233 |
| C3.0 | 05:33 | 05:38 | 05:41 | 4233 |
| C3.2 | 05:12 | 05:22 | 05:33 | 4233 |
| C2.7 | 04:06 | 04:19 | 04:34 | 4233 |
| C2.8 | 03:28 | 03:38 | 03:51 | 4233 |
| C2.3 | 02:01 | 02:09 | 02:22 | 4233 |
| M1.1 | 01:03 | 01:14 | 01:18 | 4232 |
| C3.9 | 00:22 | 00:30 | 00:35 | 4226 |