Solar flares on October 15, 2025
The most powerful solar flare in 24 hours
M4.8 (strong) flare - October 15 at 4:15 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+00
List of solar flares for October 15, 2025
The total number of solar flares of class C and higher — 18 flares
C class — 13 | M class — 5 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M2.4 | 23:37 | 23:45 | 23:52 | 4246 |
| M2.7 | 21:55 | 22:28 | 23:05 | 4246 |
| C5.1 | 19:45 | 19:49 | 19:52 | 4246 |
| C5.1 | 19:34 | 19:39 | 19:45 | 4246 |
| C8.3 | 18:02 | 18:07 | 18:09 | 4246 |
| M1.1 | 14:01 | 14:10 | 14:41 | 4246 |
| C2.7 | 13:38 | 13:45 | 13:52 | 4246 |
| C2.4 | 13:00 | 13:07 | 13:10 | 4246 |
| C3.4 | 12:14 | 12:19 | 12:23 | 4246 |
| C4.8 | 10:20 | 10:22 | 10:33 | 4246 |
| C3.4 | 09:43 | 09:54 | 10:02 | 4246 |
| C3.8 | 08:18 | 08:31 | 08:37 | — |
| M3.7 | 07:05 | 07:18 | 07:26 | 4246 |
| M4.8 | 03:49 | 04:15 | 04:36 | 4246 |
| C9.1 | 03:41 | 03:45 | 03:47 | 4246 |
| C5.6 | 03:10 | 03:14 | 03:17 | 4246 |
| C7.7 | 01:24 | 01:44 | 02:06 | 4246 |
| C5.3 | 23:56 | 00:05 | 00:16 | 4246 |