Solar flares on December 20, 2013
The most powerful solar flare in 24 hours
M3.5 (strong) flare - December 20 at 12:19 AM
Solar activity index
Value as of the end of the day on December 20, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 19, 2013 to December 20, 2013
Time zone — UTC+01 (Brussels)
List of solar flares for December 20, 2013
The total number of solar flares of class C and higher — 10 flares
C class — 8 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.7 | 22:08 | 22:16 | 22:23 | — |
| C2.3 | 18:11 | 18:14 | 18:19 | 1928 |
| C5.4 | 17:23 | 17:30 | 17:34 | 1928 |
| C8.5 | 16:26 | 16:33 | 16:39 | 1928 |
| C3.2 | 15:52 | 16:04 | 16:15 | 1928 |
| M1.6 | 12:35 | 12:57 | 13:07 | 1934 |
| C2.2 | 12:05 | 12:11 | 12:18 | 1934 |
| C1.5 | 05:45 | 05:48 | 05:53 | — |
| C2.2 | 03:53 | 03:58 | 04:02 | — |
| M3.5 | 00:06 | 00:19 | 00:26 | 1934 |