Solar flares on April 21, 2025
The most powerful solar flare in 24 hours
M1.9 (strong) flare - April 21 at 6:37 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+00
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 |
|---|---|---|---|---|
| M1.9 | 18:24 | 18:37 | 18:41 | 4062 |
| C2.1 | 06:31 | 06:42 | 06:51 | 4063 |
| C3.9 | 00:10 | 00:31 | 00:54 | 4064 |