Solar flares on May 31, 2025
The most powerful solar flare in 24 hours
M8.1 (strong) flare - May 31 at 1:05 AM
Solar activity index
Value as of the end of the day on May 31, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 30, 2025 to May 31, 2025
Time zone — UTC+01 (London) — summer time
List of solar flares for May 31, 2025
The total number of solar flares of class C and higher — 14 flares
C class — 9 | M class — 5 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 23:31 | 23:34 | 23:40 | 4100 |
| C2.2 | 22:54 | 22:58 | 23:02 | 4100 |
| C4.8 | 20:00 | 20:06 | 20:08 | 4100 |
| C2.5 | 19:13 | 19:20 | 19:24 | 4100 |
| M2.9 | 16:36 | 16:49 | 16:57 | 4100 |
| C6.5 | 14:21 | 14:28 | 14:30 | 4100 |
| C2.6 | 12:35 | 12:39 | 12:42 | 4100 |
| C3.2 | 11:01 | 11:09 | 11:22 | 4100 |
| M4.5 | 09:08 | 09:18 | 09:23 | 4100 |
| C7.0 | 08:22 | 08:27 | 08:30 | 4100 |
| C5.5 | 07:56 | 08:05 | 08:07 | 4100 |
| M2.4 | 06:12 | 06:18 | 06:20 | 4100 |
| M1.0 | 04:49 | 04:56 | 05:04 | 4100 |
| M8.1 | 00:31 | 01:05 | 02:32 | 4100 |