Solar flares on December 20, 2011
The most powerful solar flare in 24 hours
C6.2 (normal) flare - December 20 at 10:50 PM
Solar activity index
Value as of the end of the day on December 20, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 19, 2011 to December 20, 2011
Time zone — UTC+00 (London)
List of solar flares for December 20, 2011
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.2 | 22:38 | 22:50 | 23:04 | 1376 |
| C2.3 | 21:55 | 22:02 | 22:06 | — |
| C2.9 | 20:04 | 20:36 | 20:57 | 1376 |
| C1.4 | 18:17 | 18:21 | 18:28 | — |
| C2.1 | 11:47 | 11:52 | 11:54 | 1376 |
| C1.5 | 00:38 | 00:44 | 00:50 | 1381 |