Solar flares on December 21, 2015
The most powerful solar flare in 24 hours
M2.8 (strong) flare - December 21 at 2:03 AM
Solar activity index
Value as of the end of the day on December 21, 2015
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2015 to December 21, 2015
Time zone — UTC+01 (Vienna)
List of solar flares for December 21, 2015
The total number of solar flares of class C and higher — 12 flares
C class — 10 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 23:23 | 23:26 | 23:28 | 2470 |
| C6.2 | 19:08 | 19:27 | 19:42 | 2473 |
| C1.3 | 16:39 | 17:37 | 17:41 | 2473 |
| C2.1 | 15:17 | 15:33 | 15:48 | 2473 |
| M1.1 | 11:09 | 11:19 | 11:32 | 2472 |
| C1.0 | 10:00 | 10:04 | 10:09 | 2472 |
| C1.7 | 09:25 | 09:29 | 09:31 | 2472 |
| C9.1 | 06:29 | 06:39 | 06:43 | 2472 |
| C2.0 | 05:50 | 05:58 | 06:04 | 2472 |
| C2.4 | 04:10 | 04:16 | 04:21 | 2472 |
| M2.8 | 01:52 | 02:03 | 02:11 | 2472 |
| C5.4 | 00:48 | 00:58 | 01:05 | — |