Solar flares on August 21, 2013
The most powerful solar flare in 24 hours
C2.2 (normal) flare - August 21 at 9:43 AM
Solar activity index
Value as of the end of the day on August 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2013 to August 21, 2013
Time zone — UTC+02 (Oslo) — summer time
List of solar flares for August 21, 2013
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 13:25 | 13:34 | 13:48 | 1818 |
| C2.2 | 09:25 | 09:43 | 10:03 | 1828 |
| C1.6 | 06:54 | 07:00 | 07:03 | 1829 |
| C1.3 | 05:36 | 06:06 | 06:08 | 1823 |