Solar flares on August 21, 2013
The most powerful solar flare in 24 hours
C4.1 (normal) flare - August 21 at 9:06 PM
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-08 (Anchorage) — summer time
List of solar flares for August 21, 2013
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 |
|---|---|---|---|---|
| C4.1 | 20:49 | 21:06 | 21:15 | 1820 |
| C1.0 | 16:40 | 16:49 | 17:22 | 1824 |
| C1.1 | 03:25 | 03:34 | 03:48 | 1818 |