Solar flares on September 28, 2011
The most powerful solar flare in 24 hours
M1.2 (strong) flare - September 28 at 4:28 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+03 (Riga)
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 | 16:24 | 16:28 | 16:30 | 1302 |
| C9.3 | 15:26 | 15:32 | 15:38 | 1302 |
| C1.4 | 11:20 | 11:24 | 11:27 | 1302 |
| C2.0 | 05:36 | 05:44 | 05:50 | 1302 |
| C1.7 | 01:45 | 01:50 | 01:54 | — |