Solar flares on December 20, 2011
The most powerful solar flare in 24 hours
C6.2 (normal) flare - December 20 at 4:50 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-06 (Pierre)
List of solar flares for December 20, 2011
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.3 | 22:48 | 22:55 | 22:59 | 1382 |
| C3.1 | 20:57 | 21:12 | 21:16 | 1382 |
| C1.5 | 18:54 | 18:59 | 19:03 | 1376 |
| C6.2 | 16:38 | 16:50 | 17:04 | 1376 |
| C2.3 | 15:55 | 16:02 | 16:06 | — |
| C2.9 | 14:04 | 14:36 | 14:57 | 1376 |
| C1.4 | 12:17 | 12:21 | 12:28 | — |
| C2.1 | 05:47 | 05:52 | 05:54 | 1376 |