Solar flares on April 21, 2025
The most powerful solar flare in 24 hours
M1.9 (strong) flare - April 21 at 1:37 PM
Solar activity index
Value as of the end of the day on April 21, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 20, 2025 to April 21, 2025
Time zone — UTC-05 (Baton Rouge) — summer time
List of solar flares for April 21, 2025
The total number of solar flares of class C and higher — 3 flares
C class — 2 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.9 | 19:54 | 20:00 | 20:07 | — |
| M1.9 | 13:24 | 13:37 | 13:41 | 4062 |
| C2.1 | 01:31 | 01:42 | 01:51 | 4063 |