Solar flares on September 21, 2021
The most powerful solar flare in 24 hours
C1.8 (normal) flare - September 21 at 7:53 AM
Solar activity index
Value as of the end of the day on September 21, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 20, 2021 to September 21, 2021
Time zone — UTC-04 (Lansing) — summer time
List of solar flares for September 21, 2021
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 14:18 | 14:28 | 14:35 | 2871 |
| C1.8 | 07:43 | 07:53 | 07:57 | 2873 |
| C1.1 | 04:53 | 05:03 | 05:16 | 2873 |