Solar flares on September 28, 2011
The most powerful solar flare in 24 hours
M1.2 (strong) flare - September 28 at 8:28 AM
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-05 (Pierre) — summer time
List of solar flares for September 28, 2011
The total number of solar flares of class C and higher — 4 flares
C class — 3 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 19:19 | 19:22 | 19:28 | — |
| M1.2 | 08:24 | 08:28 | 08:30 | 1302 |
| C9.3 | 07:26 | 07:32 | 07:38 | 1302 |
| C1.4 | 03:20 | 03:24 | 03:27 | 1302 |