Solar flares on December 21, 2013
The most powerful solar flare in 24 hours
C9.2 (normal) flare - December 21 at 4:36 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-06 (Springfield)
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 | 22:40 | 22:46 | 22:53 | 1928 |
| C5.1 | 21:35 | 21:47 | 21:58 | 1928 |
| C2.2 | 21:05 | 21:13 | 21:24 | — |
| C1.6 | 20:30 | 20:34 | 20:39 | — |
| C1.7 | 19:50 | 19:55 | 20:03 | — |
| C1.2 | 19:11 | 19:16 | 19:26 | — |
| C2.3 | 17:16 | 17:20 | 17:31 | 1928 |
| C3.2 | 15:43 | 16:22 | 16:33 | — |
| C2.1 | 14:01 | 14:06 | 14:09 | — |
| C7.5 | 13:22 | 13:29 | 13:33 | 1928 |
| C2.0 | 12:33 | 12:41 | 12:52 | — |
| C2.8 | 11:01 | 11:06 | 11:13 | — |
| C1.7 | 08:47 | 08:52 | 08:57 | 1928 |
| C9.2 | 04:27 | 04:36 | 04:44 | 1928 |