Solar flares on May 21, 2026
The most powerful solar flare in 24 hours
C9.5 (normal) flare - May 21 at 10:25 AM
Solar activity index
Value as of the end of the day on May 21, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2026 to May 21, 2026
Time zone — UTC-08 (Anchorage) — summer time
List of solar flares for May 21, 2026
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 22:40 | 22:52 | 23:03 | 4436 |
| C1.9 | 20:52 | 20:59 | 21:05 | 4436 |
| C1.9 | 19:23 | 19:34 | 19:49 | 4436 |
| C2.8 | 16:22 | 16:32 | 16:48 | 4436 |
| C1.3 | 15:04 | 15:10 | 15:15 | 4436 |
| C1.2 | 11:41 | 11:58 | 12:35 | 4443 |
| C9.5 | 10:19 | 10:25 | 10:30 | 4436 |
| C8.3 | 10:04 | 10:14 | 10:19 | 4436 |
| C1.0 | 08:29 | 08:37 | 08:40 | — |
| C5.5 | 05:09 | 05:21 | 05:24 | 4436 |