Solar flares on April 21, 2023
The most powerful solar flare in 24 hours
M1.7 (strong) flare - April 21 at 2:12 PM
Solar activity index
Value as of the end of the day on April 21, 2023
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 20, 2023 to April 21, 2023
Time zone — UTC-04 (Thunder bay) — summer time
List of solar flares for April 21, 2023
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 |
|---|---|---|---|---|
| C4.8 | 21:34 | 21:48 | 21:56 | 3279 |
| C4.0 | 18:12 | 18:23 | 18:30 | 3279 |
| M1.7 | 13:44 | 14:12 | 14:44 | 3283 |