Solar flares on October 31, 2025
The most powerful solar flare in 24 hours
C7.1 (normal) flare - October 31 at 1:43 PM
Solar activity index
Value as of the end of the day on October 31, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 30, 2025 to October 31, 2025
Time zone — UTC-07 (Seattle) — summer time
List of solar flares for October 31, 2025
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.3 | 16:17 | 16:26 | 16:37 | 4271 |
| C7.1 | 12:37 | 13:43 | 14:40 | — |
| C3.7 | 09:39 | 09:53 | 10:23 | — |
| C1.1 | 01:25 | 01:38 | 01:56 | — |