Solar flares on December 28, 2011
The most powerful solar flare in 24 hours
C7.2 (normal) flare - December 28 at 10:25 AM
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-04 (Moncton)
List of solar flares for December 28, 2011
The total number of solar flares of class C and higher — 11 flares
C class — 11 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 23:16 | 23:19 | 23:26 | — |
| C6.2 | 17:21 | 17:29 | 17:36 | 1389 |
| C2.3 | 16:53 | 17:07 | 17:10 | 1384 |
| C4.0 | 16:18 | 16:31 | 16:40 | 1386 |
| C1.3 | 15:46 | 15:51 | 15:55 | — |
| C6.4 | 12:36 | 12:40 | 12:44 | 1387 |
| C3.1 | 12:03 | 12:10 | 12:25 | — |
| C7.2 | 10:17 | 10:25 | 10:28 | 1389 |
| C2.0 | 09:05 | 09:10 | 09:16 | — |
| C1.1 | 07:49 | 07:53 | 07:57 | — |
| C2.6 | 01:19 | 01:28 | 01:35 | 1389 |