Solar flares on December 20, 2011
The most powerful solar flare in 24 hours
C6.2 (normal) flare - December 20 at 3:50 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-07 (Fort Smith)
List of solar flares for December 20, 2011
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 |
|---|---|---|---|---|
| C2.0 | 23:56 | 23:59 | 00:03 | 1384 |
| C3.6 | 23:22 | 23:27 | 23:33 | 1382 |
| C4.3 | 21:48 | 21:55 | 21:59 | 1382 |
| C3.1 | 19:57 | 20:12 | 20:16 | 1382 |
| C1.5 | 17:54 | 17:59 | 18:03 | 1376 |
| C6.2 | 15:38 | 15:50 | 16:04 | 1376 |
| C2.3 | 14:55 | 15:02 | 15:06 | — |
| C2.9 | 13:04 | 13:36 | 13:57 | 1376 |
| C1.4 | 11:17 | 11:21 | 11:28 | — |
| C2.1 | 04:47 | 04:52 | 04:54 | 1376 |