Solar flares on December 28, 2011
The most powerful solar flare in 24 hours
C7.2 (normal) flare - December 28 at 5:25 PM
Solar activity index
Value as of the end of the day on December 28, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 27, 2011 to December 28, 2011
Time zone — UTC+03 (Murmansk)
List of solar flares for December 28, 2011
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.0 | 23:18 | 23:31 | 23:40 | 1386 |
| C1.3 | 22:46 | 22:51 | 22:55 | — |
| C6.4 | 19:36 | 19:40 | 19:44 | 1387 |
| C3.1 | 19:03 | 19:10 | 19:25 | — |
| C7.2 | 17:17 | 17:25 | 17:28 | 1389 |
| C2.0 | 16:05 | 16:10 | 16:16 | — |
| C1.1 | 14:49 | 14:53 | 14:57 | — |
| C2.6 | 08:19 | 08:28 | 08:35 | 1389 |
| C4.5 | 06:30 | 06:50 | 07:10 | 1389 |
| C2.1 | 04:54 | 05:08 | 05:16 | 1389 |
| C2.3 | 03:14 | 03:30 | 03:40 | 1387 |
| C6.7 | 00:46 | 01:26 | 01:49 | — |