Solar flares on July 21, 2013
The most powerful solar flare in 24 hours
C3.1 (normal) flare - July 21 at 9:44 AM
Solar activity index
Value as of the end of the day on July 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 20, 2013 to July 21, 2013
Time zone — UTC+01 (London) — summer time
List of solar flares for July 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 |
|---|---|---|---|---|
| C3.1 | 09:24 | 09:44 | 10:39 | 1800 |
| C1.0 | 03:58 | 04:08 | 04:10 | 1800 |
| C1.0 | 00:33 | 00:38 | 00:42 | 1800 |