Solar flares on April 13, 2011
The most powerful solar flare in 24 hours
C2.5 (normal) flare - April 13 at 2:43 PM
Solar activity index
Value as of the end of the day on April 13, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 12, 2011 to April 13, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for April 13, 2011
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.5 | 20:04 | 20:11 | 20:15 | — |
| C1.1 | 17:02 | 17:07 | 17:11 | 1190 |
| C2.5 | 14:12 | 14:43 | 14:49 | — |
| C1.4 | 11:37 | 11:41 | 11:45 | 1185 |
| C1.0 | 09:29 | 09:32 | 09:36 | 1193 |
| C1.2 | 08:55 | 08:59 | 09:03 | 1191 |
| C2.2 | 07:25 | 07:28 | 07:32 | — |
| C1.9 | 04:21 | 04:30 | 04:36 | 1191 |