Solar flares on December 17, 2021
The most powerful solar flare in 24 hours
M1.2 (strong) flare - December 17 at 12:51 AM
Solar activity index
Value as of the end of the day on December 17, 2021
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 16, 2021 to December 17, 2021
Time zone — UTC+00
List of solar flares for December 17, 2021
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 22:22 | 22:30 | 22:36 | — |
| C1.5 | 17:39 | 17:53 | 18:08 | 2911 |
| C1.0 | 14:22 | 14:30 | 14:39 | 2907 |
| C2.3 | 12:55 | 13:12 | 13:25 | 2909 |
| C1.3 | 06:18 | 06:25 | 06:30 | 2911 |
| C1.4 | 05:06 | 05:10 | 05:15 | 2911 |
| C1.3 | 04:50 | 04:58 | 05:03 | 2911 |
| C1.2 | 04:01 | 04:08 | 04:12 | 2911 |
| C1.5 | 03:25 | 03:31 | 03:41 | 2911 |
| M1.2 | 00:39 | 00:51 | 00:56 | 2911 |