Solar flares on October 20, 2025
The most powerful solar flare in 24 hours
M1.0 (strong) flare - October 20 at 12:27 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-05 (Winnipeg) — summer time
List of solar flares for October 20, 2025
The total number of solar flares of class C and higher — 5 flares
C class — 4 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 18:16 | 18:24 | 18:33 | 4248 |
| C3.0 | 10:14 | 10:45 | 11:23 | 4257 |
| C2.6 | 04:47 | 04:55 | 04:59 | 4248 |
| C3.5 | 02:39 | 02:48 | 03:20 | 4248 |
| M1.0 | 00:10 | 00:27 | 00:38 | 4248 |