Solar flares on September 23, 2021
The most powerful solar flare in 24 hours
M2.8 (strong) flare - September 23 at 4:42 AM
Solar activity index
Value as of the end of the day on September 23, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 22, 2021 to September 23, 2021
Time zone — UTC+00
List of solar flares for September 23, 2021
The total number of solar flares of class C and higher — 2 flares
C class — 1 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 20:34 | 20:41 | 20:46 | 2871 |
| M2.8 | 04:35 | 04:42 | 04:50 | 2871 |