Solar flares on September 4, 2011
The most powerful solar flare in 24 hours
M3.2 (strong) flare - September 4 at 11:45 AM
Solar activity index
Value as of the end of the day on September 4, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 3, 2011 to September 4, 2011
Time zone — UTC+00
List of solar flares for September 4, 2011
The total number of solar flares of class C and higher — 6 flares
C class — 5 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.4 | 19:40 | 19:47 | 19:59 | — |
| C5.8 | 15:21 | 15:34 | 15:53 | 1286 |
| M3.2 | 11:21 | 11:45 | 11:50 | 1286 |
| C4.0 | 05:35 | 06:18 | 06:28 | 1286 |
| C9.0 | 04:36 | 04:53 | 05:03 | 1286 |
| C8.3 | 01:01 | 01:07 | 01:13 | 1286 |