Solar flares on September 27, 2025
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 27 at 2:14 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-05 (Montgomery) — summer time
List of solar flares for September 27, 2025
The total number of solar flares of class C and higher — 17 flares
C class — 16 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.8 | 19:52 | 20:01 | 20:10 | 4233 |
| C3.1 | 15:53 | 15:58 | 16:03 | 4233 |
| C5.4 | 14:44 | 14:54 | 15:01 | 4232 |
| C7.6 | 12:51 | 12:56 | 12:59 | 4232 |
| C6.8 | 12:39 | 12:49 | 12:51 | 4232 |
| C3.1 | 11:45 | 11:49 | 11:51 | 4226 |
| C2.9 | 11:16 | 11:27 | 11:45 | 4233 |
| C2.0 | 10:08 | 10:15 | 10:21 | 4233 |
| C7.3 | 07:59 | 08:16 | 08:25 | 4233 |
| C3.0 | 06:33 | 06:38 | 06:41 | 4233 |
| C3.2 | 06:12 | 06:22 | 06:33 | 4233 |
| C2.7 | 05:06 | 05:19 | 05:34 | 4233 |
| C2.8 | 04:28 | 04:38 | 04:51 | 4233 |
| C2.3 | 03:01 | 03:09 | 03:22 | 4233 |
| M1.1 | 02:03 | 02:14 | 02:18 | 4232 |
| C3.9 | 01:22 | 01:30 | 01:35 | 4226 |
| C4.9 | 00:30 | 00:34 | 00:37 | — |