Solar flares on September 21, 2013
The most powerful solar flare in 24 hours
C3.0 (normal) flare - September 21 at 9:24 AM
Solar activity index
Value as of the end of the day on September 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 20, 2013 to September 21, 2013
Time zone — UTC+00
List of solar flares for September 21, 2013
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 08:38 | 09:24 | 09:32 | — |
| C1.0 | 01:39 | 01:45 | 01:52 | 1850 |