Solar flares on October 15, 2025
The most powerful solar flare in 24 hours
M4.8 (strong) flare - October 15 at 5:15 AM
Solar activity index
Value as of the end of the day on October 15, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 14, 2025 to October 15, 2025
Time zone — UTC+01 (London) — summer time
List of solar flares for October 15, 2025
The total number of solar flares of class C and higher — 18 flares
C class — 14 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M2.7 | 22:55 | 23:28 | 00:05 | 4246 |
| C5.1 | 20:45 | 20:49 | 20:52 | 4246 |
| C5.1 | 20:34 | 20:39 | 20:45 | 4246 |
| C8.3 | 19:02 | 19:07 | 19:09 | 4246 |
| M1.1 | 15:01 | 15:10 | 15:41 | 4246 |
| C2.7 | 14:38 | 14:45 | 14:52 | 4246 |
| C2.4 | 14:00 | 14:07 | 14:10 | 4246 |
| C3.4 | 13:14 | 13:19 | 13:23 | 4246 |
| C4.8 | 11:20 | 11:22 | 11:33 | 4246 |
| C3.4 | 10:43 | 10:54 | 11:02 | 4246 |
| C3.8 | 09:18 | 09:31 | 09:37 | — |
| M3.7 | 08:05 | 08:18 | 08:26 | 4246 |
| M4.8 | 04:49 | 05:15 | 05:36 | 4246 |
| C9.1 | 04:41 | 04:45 | 04:47 | 4246 |
| C5.6 | 04:10 | 04:14 | 04:17 | 4246 |
| C7.7 | 02:24 | 02:44 | 03:06 | 4246 |
| C5.3 | 00:56 | 01:05 | 01:16 | 4246 |
| C4.3 | 00:29 | 00:42 | 00:53 | 4246 |