Solar flares on October 17, 2025
The most powerful solar flare in 24 hours
M1.3 (strong) flare - October 17 at 10:32 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-06 (Cambridge Bay) — summer time
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 |
|---|---|---|---|---|
| M1.1 | 20:26 | 20:39 | 20:47 | 4246 |
| C9.5 | 20:18 | 20:24 | 20:26 | 4246 |
| C2.9 | 20:05 | 20:09 | 20:14 | 4246 |
| M1.0 | 18:23 | 18:40 | 18:49 | 4246 |
| M1.2 | 10:47 | 10:58 | 11:08 | 4246 |
| M1.3 | 10:14 | 10:32 | 10:47 | 4246 |
| M1.0 | 08:22 | 08:32 | 08:36 | 4246 |
| M1.1 | 06:27 | 06:45 | 07:01 | 4246 |
| C6.1 | 06:02 | 06:06 | 06:17 | 4246 |
| C7.2 | 04:42 | 04:46 | 04:49 | 4246 |
| C6.5 | 04:30 | 04:37 | 04:42 | 4246 |
| C6.7 | 04:14 | 04:20 | 04:30 | 4246 |