Solar flares on September 15, 2011
The most powerful solar flare in 24 hours
C4.6 (normal) flare - September 15 at 1:29 AM
Solar activity index
Value as of the end of the day on September 15, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 14, 2011 to September 15, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for September 15, 2011
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 23:46 | 23:53 | 23:59 | — |
| C2.6 | 22:09 | 22:14 | 22:19 | 1297 |
| C1.3 | 21:32 | 21:38 | 21:43 | — |
| C1.0 | 19:27 | 19:32 | 19:38 | 1296 |
| C3.0 | 17:18 | 17:26 | 17:41 | — |
| C1.4 | 11:55 | 11:59 | 12:02 | — |
| C1.3 | 05:28 | 05:32 | 05:35 | — |
| C1.9 | 04:04 | 04:08 | 04:11 | — |
| C2.3 | 03:41 | 03:46 | 03:50 | 1297 |
| C1.5 | 02:59 | 03:08 | 03:20 | — |
| C4.6 | 01:24 | 01:29 | 01:32 | 1297 |
| C3.1 | 00:29 | 00:37 | 00:41 | 1295 |