Solar flares on September 22, 2025
The most powerful solar flare in 24 hours
C4.2 (normal) flare - September 22 at 11:09 AM
Solar activity index
Value as of the end of the day on September 22, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 21, 2025 to September 22, 2025
Time zone — UTC-05 (Memphis) — summer time
List of solar flares for September 22, 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 |
|---|---|---|---|---|
| C4.2 | 10:58 | 11:09 | 11:18 | — |
| C1.7 | 02:08 | 02:16 | 02:21 | 4217 |