Solar flares on October 17, 2025
The most powerful solar flare in 24 hours
M1.5 (strong) flare - October 17 at 4:28 AM
Solar activity index
Value as of the end of the day on October 17, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 16, 2025 to October 17, 2025
Time zone — UTC+03 (Moscow)
List of solar flares for October 17, 2025
The total number of solar flares of class C and higher — 12 flares
C class — 6 | M class — 6 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.2 | 19:47 | 19:58 | 20:08 | 4246 |
| M1.3 | 19:14 | 19:32 | 19:47 | 4246 |
| M1.0 | 17:22 | 17:32 | 17:36 | 4246 |
| M1.1 | 15:27 | 15:45 | 16:01 | 4246 |
| C6.1 | 15:02 | 15:06 | 15:17 | 4246 |
| C7.2 | 13:42 | 13:46 | 13:49 | 4246 |
| C6.5 | 13:30 | 13:37 | 13:42 | 4246 |
| C6.7 | 13:14 | 13:20 | 13:30 | 4246 |
| C8.0 | 08:48 | 08:54 | 08:57 | 4248 |
| M1.5 | 04:15 | 04:28 | 04:40 | 4246 |
| M1.0 | 02:12 | 02:19 | 02:28 | 4246 |
| C5.5 | 01:38 | 01:54 | 02:02 | 4246 |