Solar flares on May 21, 2026
The most powerful solar flare in 24 hours
C9.5 (normal) flare - May 21 at 6:25 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+00
List of solar flares for May 21, 2026
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 23:04 | 23:10 | 23:15 | 4436 |
| C1.2 | 19:41 | 19:58 | 20:35 | 4443 |
| C9.5 | 18:19 | 18:25 | 18:30 | 4436 |
| C8.3 | 18:04 | 18:14 | 18:19 | 4436 |
| C1.0 | 16:29 | 16:37 | 16:40 | — |
| C5.5 | 13:09 | 13:21 | 13:24 | 4436 |