Solar flares on September 9, 2025
The most powerful solar flare in 24 hours
C1.6 (normal) flare - September 9 at 3:55 PM
Solar activity index
Value as of the end of the day on September 9, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 8, 2025 to September 9, 2025
Time zone — UTC+02 (Brussels) — summer time
List of solar flares for September 9, 2025
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 15:47 | 15:55 | 16:00 | 4210 |
| C1.5 | 05:17 | 05:23 | 05:26 | 4207 |