Solar flares on October 15, 2025
The most powerful solar flare in 24 hours
M4.8 (strong) flare - October 15 at 12:15 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-04 (Columbia) — summer time
List of solar flares for October 15, 2025
The total number of solar flares of class C and higher — 15 flares
C class — 9 | M class — 6 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.1 | 20:17 | 20:21 | 20:24 | 4246 |
| M2.4 | 19:37 | 19:45 | 19:52 | 4246 |
| M2.7 | 17:55 | 18:28 | 19:05 | 4246 |
| C5.1 | 15:45 | 15:49 | 15:52 | 4246 |
| C5.1 | 15:34 | 15:39 | 15:45 | 4246 |
| C8.3 | 14:02 | 14:07 | 14:09 | 4246 |
| M1.1 | 10:01 | 10:10 | 10:41 | 4246 |
| C2.7 | 09:38 | 09:45 | 09:52 | 4246 |
| C2.4 | 09:00 | 09:07 | 09:10 | 4246 |
| C3.4 | 08:14 | 08:19 | 08:23 | 4246 |
| C4.8 | 06:20 | 06:22 | 06:33 | 4246 |
| C3.4 | 05:43 | 05:54 | 06:02 | 4246 |
| C3.8 | 04:18 | 04:31 | 04:37 | — |
| M3.7 | 03:05 | 03:18 | 03:26 | 4246 |
| M4.8 | 23:49 | 00:15 | 00:36 | 4246 |