Solar flares on April 20, 2011
The most powerful solar flare in 24 hours
C4.0 (normal) flare - April 20 at 10:39 PM
Solar activity index
Value as of the end of the day on April 20, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 19, 2011 to April 20, 2011
Time zone — UTC+03 (Moscow)
List of solar flares for April 20, 2011
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 |
|---|---|---|---|---|
| C4.0 | 22:30 | 22:39 | 22:49 | 1195 |
| C1.5 | 20:38 | 21:36 | 22:06 | — |
| C1.0 | 06:46 | 07:31 | 07:49 | 1195 |