Solar flares on September 17, 2011
The most powerful solar flare in 24 hours
C2.6 (normal) flare - September 17 at 12:51 AM
Solar activity index
Value as of the end of the day on September 17, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 16, 2011 to September 17, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for September 17, 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 | 11:47 | 11:50 | 11:52 | — |
| C1.4 | 09:05 | 09:08 | 09:10 | 1290 |
| C2.6 | 00:09 | 00:51 | 01:44 | 1289 |