Solar flares on May 21, 2013
The most powerful solar flare in 24 hours
C1.5 (normal) flare - May 21 at 3:12 AM
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+03 (Tula)
List of solar flares for May 21, 2013
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 20:32 | 20:37 | 20:40 | 1755 |
| C1.2 | 13:23 | 13:40 | 13:50 | 1745 |
| C1.1 | 10:27 | 10:48 | 10:54 | 1751 |
| C1.5 | 03:06 | 03:12 | 03:22 | 1751 |
| C1.3 | 01:27 | 01:30 | 01:33 | 1748 |