Solar flares on September 11, 2025
The most powerful solar flare in 24 hours
C7.6 (normal) flare - September 11 at 10:21 AM
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-05 (Chicago) — summer time
List of solar flares for September 11, 2025
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 17:16 | 17:29 | 17:53 | 4216 |
| C1.8 | 14:37 | 14:48 | 15:03 | 4216 |
| C1.0 | 14:16 | 14:24 | 14:28 | 4213 |
| C1.2 | 13:58 | 14:03 | 14:07 | 4207 |
| C1.9 | 12:03 | 12:07 | 12:10 | 4207 |
| C7.6 | 10:09 | 10:21 | 10:33 | 4207 |