Solar flares on December 20, 2011
The most powerful solar flare in 24 hours
C6.2 (normal) flare - December 20 at 11:50 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+01 (Oslo)
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 | 23:38 | 23:50 | 00:04 | 1376 |
| C2.3 | 22:55 | 23:02 | 23:06 | — |
| C2.9 | 21:04 | 21:36 | 21:57 | 1376 |
| C1.4 | 19:17 | 19:21 | 19:28 | — |
| C2.1 | 12:47 | 12:52 | 12:54 | 1376 |
| C1.5 | 01:38 | 01:44 | 01:50 | 1381 |