Solar flares on May 15, 2025
The most powerful solar flare in 24 hours
M2.1 (strong) flare - May 15 at 6:21 PM
Solar activity index
Value as of the end of the day on May 15, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 14, 2025 to May 15, 2025
Time zone — UTC+01 (London) — summer time
List of solar flares for May 15, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.6 | 23:11 | 23:19 | 23:21 | 4087 |
| C1.2 | 22:27 | 22:36 | 22:40 | 4087 |
| C1.1 | 20:47 | 20:53 | 20:59 | — |
| M2.1 | 18:08 | 18:21 | 18:27 | 4087 |
| C3.6 | 16:17 | 16:27 | 16:37 | 4087 |
| C1.2 | 15:54 | 15:58 | 16:00 | 4087 |
| C1.2 | 15:38 | 15:44 | 15:54 | 4087 |
| C1.0 | 14:32 | 14:39 | 14:47 | 4087 |
| C1.3 | 04:38 | 04:46 | 04:48 | 4088 |
| C1.0 | 04:00 | 04:06 | 04:08 | — |