Solar flares on May 21, 2013
The most powerful solar flare in 24 hours
C2.9 (normal) flare - May 21 at 11:37 PM
Solar activity index
Value as of the end of the day on May 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2013 to May 21, 2013
Time zone — UTC+01 (London) — summer time
List of solar flares for May 21, 2013
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.9 | 23:32 | 23:37 | 23:43 | 1756 |
| C1.5 | 23:02 | 23:09 | 23:14 | — |
| C1.0 | 18:32 | 18:37 | 18:40 | 1755 |
| C1.2 | 11:23 | 11:40 | 11:50 | 1745 |
| C1.1 | 08:27 | 08:48 | 08:54 | 1751 |
| C1.5 | 01:06 | 01:12 | 01:22 | 1751 |