Solar flares on December 31, 2011
The most powerful solar flare in 24 hours
M2.4 (strong) flare - December 31 at 1:15 PM
Solar activity index
Value as of the end of the day on December 31, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 30, 2011 to December 31, 2011
Time zone — UTC+00 (London)
List of solar flares for December 31, 2011
The total number of solar flares of class C and higher — 3 flares
C class — 1 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 17:17 | 17:31 | 17:48 | 1386 |
| M1.5 | 16:16 | 16:26 | 16:34 | 1389 |
| M2.4 | 13:09 | 13:15 | 13:19 | 1389 |