Solar flares on September 11, 2025
The most powerful solar flare in 24 hours
C7.6 (normal) flare - September 11 at 3:21 PM
Solar activity index
Value as of the end of the day on September 11, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 10, 2025 to September 11, 2025
Time zone — UTC+00
List of solar flares for September 11, 2025
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 22:16 | 22:29 | 22:53 | 4216 |
| C1.8 | 19:37 | 19:48 | 20:03 | 4216 |
| C1.0 | 19:16 | 19:24 | 19:28 | 4213 |
| C1.2 | 18:58 | 19:03 | 19:07 | 4207 |
| C1.9 | 17:03 | 17:07 | 17:10 | 4207 |
| C7.6 | 15:09 | 15:21 | 15:33 | 4207 |
| C1.0 | 04:04 | 04:09 | 04:11 | 4207 |
| C1.1 | 03:17 | 03:27 | 04:04 | 4207 |