Solar flares on April 21, 2026
The most powerful solar flare in 24 hours
C5.3 (normal) flare - April 21 at 9:02 AM
Solar activity index
Value as of the end of the day on April 21, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 20, 2026 to April 21, 2026
Time zone — UTC+03 (Tambov)
List of solar flares for April 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 |
|---|---|---|---|---|
| C1.7 | 21:25 | 21:36 | 21:49 | 4420 |
| C1.4 | 19:29 | 19:43 | 19:56 | 4420 |
| C1.9 | 17:15 | 17:24 | 17:40 | 4420 |
| C1.4 | 16:41 | 17:02 | 17:12 | 4420 |
| C4.0 | 14:45 | 14:50 | 14:55 | 4420 |
| C2.2 | 14:25 | 14:30 | 14:42 | 4420 |
| C1.6 | 12:42 | 12:56 | 13:06 | 4420 |
| C1.4 | 09:47 | 09:55 | 10:00 | 4420 |
| C5.3 | 08:53 | 09:02 | 09:08 | 4421 |
| C1.3 | 04:03 | 04:15 | 04:24 | — |