Solar flares on April 21, 2024
The most powerful solar flare in 24 hours
M3.4 (strong) flare - April 21 at 12:52 PM
Solar activity index
Value as of the end of the day on April 21, 2024
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 20, 2024 to April 21, 2024
Time zone — UTC-09 (Honolulu) — summer time
List of solar flares for April 21, 2024
The total number of solar flares of class C and higher — 11 flares
C class — 7 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.0 | 22:58 | 23:13 | 23:30 | 3645 |
| C8.9 | 20:27 | 20:37 | 20:42 | 3638 |
| C5.5 | 18:20 | 18:25 | 18:29 | — |
| C4.9 | 18:05 | 18:17 | 18:20 | 3636 |
| C6.5 | 15:30 | 15:39 | 16:13 | 3647 |
| C3.7 | 14:37 | 14:45 | 14:49 | — |
| C4.0 | 14:06 | 14:15 | 14:37 | 3655 |
| M3.4 | 12:44 | 12:52 | 12:57 | 3638 |
| C5.3 | 11:42 | 11:55 | 12:10 | 3647 |
| M2.2 | 06:07 | 06:14 | 06:20 | 3638 |
| M1.0 | 03:39 | 03:59 | 04:34 | 3645 |