Solar flares on October 17, 2011
The most powerful solar flare in 24 hours
C2.1 (normal) flare - October 17 at 9:28 AM
Solar activity index
Value as of the end of the day on October 17, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 16, 2011 to October 17, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for October 17, 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 |
|---|---|---|---|---|
| C1.9 | 19:05 | 19:09 | 19:13 | 1324 |
| C1.8 | 10:29 | 10:32 | 10:34 | — |
| C2.1 | 09:24 | 09:28 | 09:30 | — |
| C1.6 | 06:40 | 08:21 | 09:03 | — |