Solar flares on December 21, 2015
The most powerful solar flare in 24 hours
M2.8 (strong) flare - December 21 at 4:03 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+03 (Sevastopol)
List of solar flares for December 21, 2015
The total number of solar flares of class C and higher — 13 flares
C class — 11 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.2 | 21:08 | 21:27 | 21:42 | 2473 |
| C1.3 | 18:39 | 19:37 | 19:41 | 2473 |
| C2.1 | 17:17 | 17:33 | 17:48 | 2473 |
| M1.1 | 13:09 | 13:19 | 13:32 | 2472 |
| C1.0 | 12:00 | 12:04 | 12:09 | 2472 |
| C1.7 | 11:25 | 11:29 | 11:31 | 2472 |
| C9.1 | 08:29 | 08:39 | 08:43 | 2472 |
| C2.0 | 07:50 | 07:58 | 08:04 | 2472 |
| C2.4 | 06:10 | 06:16 | 06:21 | 2472 |
| M2.8 | 03:52 | 04:03 | 04:11 | 2472 |
| C5.4 | 02:48 | 02:58 | 03:05 | — |
| C6.0 | 01:33 | 01:44 | 01:56 | — |
| C2.3 | 00:41 | 00:50 | 01:08 | — |