Solar flares on October 20, 2025
The most powerful solar flare in 24 hours
M1.8 (strong) flare - October 20 at 1:15 AM
Solar activity index
Value as of the end of the day on October 20, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 19, 2025 to October 20, 2025
Time zone — UTC+05 (Surgut)
List of solar flares for October 20, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 5 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 20:14 | 20:45 | 21:23 | 4257 |
| C2.6 | 14:47 | 14:55 | 14:59 | 4248 |
| C3.5 | 12:39 | 12:48 | 13:20 | 4248 |
| M1.0 | 10:10 | 10:27 | 10:38 | 4248 |
| C5.9 | 07:24 | 07:34 | 07:47 | 4246 |
| C3.0 | 03:44 | 03:52 | 04:06 | — |
| M1.8 | 01:03 | 01:15 | 01:26 | 4246 |