Solar flares on May 21, 2026
The most powerful solar flare in 24 hours
C9.5 (normal) flare - May 21 at 12:25 PM
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-06 (Lethbridge) — summer time
List of solar flares for May 21, 2026
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.9 | 22:52 | 22:59 | 23:05 | 4436 |
| C1.9 | 21:23 | 21:34 | 21:49 | 4436 |
| C2.8 | 18:22 | 18:32 | 18:48 | 4436 |
| C1.3 | 17:04 | 17:10 | 17:15 | 4436 |
| C1.2 | 13:41 | 13:58 | 14:35 | 4443 |
| C9.5 | 12:19 | 12:25 | 12:30 | 4436 |
| C8.3 | 12:04 | 12:14 | 12:19 | 4436 |
| C1.0 | 10:29 | 10:37 | 10:40 | — |
| C5.5 | 07:09 | 07:21 | 07:24 | 4436 |