Solar flares on December 17, 2013
The most powerful solar flare in 24 hours
C4.0 (normal) flare - December 17 at 11:29 PM
Solar activity index
Value as of the end of the day on December 17, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 16, 2013 to December 17, 2013
Time zone — UTC+00 (London)
List of solar flares for December 17, 2013
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 |
|---|---|---|---|---|
| C4.0 | 23:25 | 23:29 | 23:32 | — |
| C1.9 | 21:28 | 21:34 | 21:40 | 1917 |
| C2.0 | 17:28 | 17:33 | 17:52 | — |