Solar flares on October 20, 2025
The most powerful solar flare in 24 hours
M1.0 (strong) flare - October 20 at 8:27 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+03 (Moscow)
List of solar flares for October 20, 2025
The total number of solar flares of class C and higher — 6 flares
C class — 5 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 18:14 | 18:45 | 19:23 | 4257 |
| C2.6 | 12:47 | 12:55 | 12:59 | 4248 |
| C3.5 | 10:39 | 10:48 | 11:20 | 4248 |
| M1.0 | 08:10 | 08:27 | 08:38 | 4248 |
| C5.9 | 05:24 | 05:34 | 05:47 | 4246 |
| C3.0 | 01:44 | 01:52 | 02:06 | — |