Solar flares on September 28, 2011
The most powerful solar flare in 24 hours
M1.2 (strong) flare - September 28 at 3:28 PM
Solar activity index
Value as of the end of the day on September 28, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 27, 2011 to September 28, 2011
Time zone — UTC+02 (Oslo) — summer time
List of solar flares for September 28, 2011
The total number of solar flares of class C and higher — 5 flares
C class — 4 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.2 | 15:24 | 15:28 | 15:30 | 1302 |
| C9.3 | 14:26 | 14:32 | 14:38 | 1302 |
| C1.4 | 10:20 | 10:24 | 10:27 | 1302 |
| C2.0 | 04:36 | 04:44 | 04:50 | 1302 |
| C1.7 | 00:45 | 00:50 | 00:54 | — |