Solar flares on April 21, 2012
The most powerful solar flare in 24 hours
C2.4 (normal) flare - April 21 at 3:32 AM
Solar activity index
Value as of the end of the day on April 21, 2012
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 20, 2012 to April 21, 2012
Time zone — UTC+02 (Zagreb) — summer time
List of solar flares for April 21, 2012
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 22:10 | 22:14 | 22:19 | 1459 |
| C1.0 | 13:00 | 13:14 | 13:24 | 1462 |
| C2.4 | 03:27 | 03:32 | 03:34 | 1460 |
| C1.4 | 00:25 | 00:35 | 00:44 | 1465 |