Solar flares on September 12, 2011
The most powerful solar flare in 24 hours
C9.9 (normal) flare - September 12 at 12:54 PM
Solar activity index
Value as of the end of the day on September 12, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 11, 2011 to September 12, 2011
Time zone — UTC-08 (Anchorage) — summer time
List of solar flares for September 12, 2011
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 20:12 | 20:19 | 20:32 | — |
| C9.9 | 12:30 | 12:54 | 13:51 | 1295 |
| C2.9 | 04:15 | 04:29 | 04:40 | 1295 |