Solar flares on October 18, 2025
The most powerful solar flare in 24 hours
M1.5 (strong) flare - October 18 at 1:51 PM
Solar activity index
Value as of the end of the day on October 18, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 17, 2025 to October 18, 2025
Time zone — UTC+03 (Moscow)
List of solar flares for October 18, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 5 | M class — 5 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 20:32 | 20:37 | 20:51 | 4246 |
| M1.5 | 13:37 | 13:51 | 13:59 | 4246 |
| C6.0 | 10:35 | 10:48 | 10:55 | 4246 |
| M1.3 | 09:49 | 09:58 | 10:04 | 4246 |
| M1.2 | 09:32 | 09:39 | 09:44 | 4246 |
| C9.9 | 08:43 | 09:05 | 09:19 | 4246 |
| M1.1 | 05:26 | 05:39 | 05:47 | 4246 |
| C9.5 | 05:18 | 05:24 | 05:26 | 4246 |
| C2.9 | 05:05 | 05:09 | 05:14 | 4246 |
| M1.0 | 03:23 | 03:40 | 03:49 | 4246 |