Solar flares on September 12, 2011
The most powerful solar flare in 24 hours
C9.9 (normal) flare - September 12 at 9:54 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+01 (London) — summer time
List of solar flares for September 12, 2011
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.9 | 21:30 | 21:54 | 22:51 | 1295 |
| C2.9 | 13:15 | 13:29 | 13:40 | 1295 |
| C2.0 | 04:24 | 04:29 | 04:33 | 1292 |
| C1.7 | 03:22 | 03:26 | 03:30 | 1292 |