Solar flares on May 31, 2025
The most powerful solar flare in 24 hours
M8.1 (strong) flare - May 31 at 2:05 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+02 (Vienna) — summer time
List of solar flares for May 31, 2025
The total number of solar flares of class C and higher — 13 flares
C class — 8 | M class — 5 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 23:54 | 23:58 | 00:02 | 4100 |
| C4.8 | 21:00 | 21:06 | 21:08 | 4100 |
| C2.5 | 20:13 | 20:20 | 20:24 | 4100 |
| M2.9 | 17:36 | 17:49 | 17:57 | 4100 |
| C6.5 | 15:21 | 15:28 | 15:30 | 4100 |
| C2.6 | 13:35 | 13:39 | 13:42 | 4100 |
| C3.2 | 12:01 | 12:09 | 12:22 | 4100 |
| M4.5 | 10:08 | 10:18 | 10:23 | 4100 |
| C7.0 | 09:22 | 09:27 | 09:30 | 4100 |
| C5.5 | 08:56 | 09:05 | 09:07 | 4100 |
| M2.4 | 07:12 | 07:18 | 07:20 | 4100 |
| M1.0 | 05:49 | 05:56 | 06:04 | 4100 |
| M8.1 | 01:31 | 02:05 | 03:32 | 4100 |