Solar flares on September 23, 2025
The most powerful solar flare in 24 hours
M1.0 (strong) flare - September 23 at 10:34 AM
Solar activity index
Value as of the end of the day on September 23, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 22, 2025 to September 23, 2025
Time zone — UTC+00
List of solar flares for September 23, 2025
The total number of solar flares of class C and higher — 4 flares
C class — 3 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.0 | 22:34 | 22:43 | 22:54 | 4224 |
| C1.9 | 18:17 | 18:25 | 18:41 | 4230 |
| M1.0 | 10:24 | 10:34 | 10:38 | 4217 |
| C2.5 | 09:07 | 09:20 | 09:34 | 4228 |