Solar flares on December 20, 2011
The most powerful solar flare in 24 hours
C6.2 (normal) flare - December 20 at 5:50 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-05 (Hamilton (Canada))
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 | 23:48 | 23:55 | 23:59 | 1382 |
| C3.1 | 21:57 | 22:12 | 22:16 | 1382 |
| C1.5 | 19:54 | 19:59 | 20:03 | 1376 |
| C6.2 | 17:38 | 17:50 | 18:04 | 1376 |
| C2.3 | 16:55 | 17:02 | 17:06 | — |
| C2.9 | 15:04 | 15:36 | 15:57 | 1376 |
| C1.4 | 13:17 | 13:21 | 13:28 | — |
| C2.1 | 06:47 | 06:52 | 06:54 | 1376 |