Solar flares on July 31, 2011
The most powerful solar flare in 24 hours
C2.1 (normal) flare - July 31 at 8:47 PM
Solar activity index
Value as of the end of the day on July 31, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 30, 2011 to July 31, 2011
Time zone — UTC-04 (Augusta) — summer time
List of solar flares for July 31, 2011
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 20:39 | 20:47 | 21:11 | 1263 |
| C1.0 | 20:03 | 20:07 | 20:25 | — |
| C1.0 | 19:36 | 19:40 | 19:44 | 1263 |
| C1.5 | 18:46 | 18:54 | 18:57 | — |
| C1.8 | 17:48 | 18:04 | 18:11 | 1261 |
| C1.9 | 16:41 | 16:47 | 16:50 | 1263 |
| C1.7 | 15:01 | 15:09 | 15:17 | 1265 |
| C1.4 | 14:43 | 14:50 | 14:52 | 1263 |
| C1.1 | 13:57 | 14:01 | 14:03 | 1263 |