Solar flares on April 21, 2024
The most powerful solar flare in 24 hours
M3.4 (strong) flare - April 21 at 5:52 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-04 (Kitchener) — 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 — 8 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.5 | 23:20 | 23:25 | 23:29 | — |
| C4.9 | 23:05 | 23:17 | 23:20 | 3636 |
| C6.5 | 20:30 | 20:39 | 21:13 | 3647 |
| C3.7 | 19:37 | 19:45 | 19:49 | — |
| C4.0 | 19:06 | 19:15 | 19:37 | 3655 |
| M3.4 | 17:44 | 17:52 | 17:57 | 3638 |
| C5.3 | 16:42 | 16:55 | 17:10 | 3647 |
| M2.2 | 11:07 | 11:14 | 11:20 | 3638 |
| M1.0 | 08:39 | 08:59 | 09:34 | 3645 |
| C3.8 | 00:39 | 00:46 | 00:53 | 3638 |
| C3.9 | 00:25 | 00:34 | 00:39 | 3638 |