Solar flares on September 16, 2021
The most powerful solar flare in 24 hours
C3.5 (normal) flare - September 16 at 11:20 PM
Solar activity index
Value as of the end of the day on September 16, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 15, 2021 to September 16, 2021
Time zone — UTC-05 (Des Moines) — summer time
List of solar flares for September 16, 2021
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 23:09 | 23:20 | 23:48 | 2871 |