Solar flares on December 21, 2013
The most powerful solar flare in 24 hours
C9.2 (normal) flare - December 21 at 5:36 AM
Solar activity index
Value as of the end of the day on December 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2013 to December 21, 2013
Time zone — UTC-05 (Quebec)
List of solar flares for December 21, 2013
The total number of solar flares of class C and higher — 14 flares
C class — 14 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.7 | 23:40 | 23:46 | 23:53 | 1928 |
| C5.1 | 22:35 | 22:47 | 22:58 | 1928 |
| C2.2 | 22:05 | 22:13 | 22:24 | — |
| C1.6 | 21:30 | 21:34 | 21:39 | — |
| C1.7 | 20:50 | 20:55 | 21:03 | — |
| C1.2 | 20:11 | 20:16 | 20:26 | — |
| C2.3 | 18:16 | 18:20 | 18:31 | 1928 |
| C3.2 | 16:43 | 17:22 | 17:33 | — |
| C2.1 | 15:01 | 15:06 | 15:09 | — |
| C7.5 | 14:22 | 14:29 | 14:33 | 1928 |
| C2.0 | 13:33 | 13:41 | 13:52 | — |
| C2.8 | 12:01 | 12:06 | 12:13 | — |
| C1.7 | 09:47 | 09:52 | 09:57 | 1928 |
| C9.2 | 05:27 | 05:36 | 05:44 | 1928 |