Solar flares on August 4, 2011
The most powerful solar flare in 24 hours
M9.3 (strong) flare - August 4 at 3:57 AM
Solar activity index
Value as of the end of the day on August 4, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 3, 2011 to August 4, 2011
Time zone — UTC+00 (Reykjavik)
List of solar flares for August 4, 2011
The total number of solar flares of class C and higher — 14 flares
C class — 13 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.6 | 23:21 | 23:28 | 23:32 | 1261 |
| C1.7 | 22:54 | 23:00 | 23:05 | — |
| C1.2 | 22:03 | 22:08 | 22:13 | — |
| C3.2 | 21:07 | 21:15 | 21:24 | 1261 |
| C1.8 | 14:32 | 14:38 | 14:44 | 1263 |
| C1.0 | 14:09 | 14:17 | 14:26 | 1261 |
| C2.1 | 13:04 | 13:07 | 13:12 | 1263 |
| C1.2 | 11:43 | 11:49 | 11:56 | 1261 |
| C1.6 | 10:06 | 10:12 | 10:19 | 1261 |
| C2.5 | 09:15 | 09:20 | 09:23 | 1261 |
| C3.5 | 07:56 | 08:02 | 08:06 | 1261 |
| M9.3 | 03:41 | 03:57 | 04:04 | 1261 |
| C3.2 | 02:14 | 02:23 | 02:28 | 1261 |
| C1.7 | 00:47 | 01:09 | 01:23 | 1261 |