Solar flares on December 21, 2013
The most powerful solar flare in 24 hours
C9.2 (normal) flare - December 21 at 10:36 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+00
List of solar flares for December 21, 2013
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.3 | 23:16 | 23:20 | 23:31 | 1928 |
| C3.2 | 21:43 | 22:22 | 22:33 | — |
| C2.1 | 20:01 | 20:06 | 20:09 | — |
| C7.5 | 19:22 | 19:29 | 19:33 | 1928 |
| C2.0 | 18:33 | 18:41 | 18:52 | — |
| C2.8 | 17:01 | 17:06 | 17:13 | — |
| C1.7 | 14:47 | 14:52 | 14:57 | 1928 |
| C9.2 | 10:27 | 10:36 | 10:44 | 1928 |
| C3.5 | 02:56 | 03:03 | 03:08 | 1928 |
| C3.0 | 00:06 | 00:13 | 00:18 | 1928 |