Solar flares on December 19, 2025
The most powerful solar flare in 24 hours
M1.0 (strong) flare - December 19 at 10:53 PM
Solar activity index
Value as of the end of the day on December 19, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 18, 2025 to December 19, 2025
Time zone — UTC-09 (Anchorage)
List of solar flares for December 19, 2025
The total number of solar flares of class C and higher — 10 flares
C class — 8 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.0 | 22:36 | 22:53 | 23:06 | 4315 |
| C1.4 | 21:52 | 22:06 | 22:25 | 4315 |
| C1.3 | 21:08 | 21:14 | 21:23 | 4315 |
| C1.2 | 20:42 | 20:46 | 20:49 | — |
| C1.3 | 20:22 | 20:34 | 20:42 | — |
| C1.2 | 15:59 | 16:09 | 16:13 | — |
| C1.8 | 13:15 | 13:23 | 13:31 | 4312 |
| C2.3 | 08:04 | 08:16 | 08:24 | — |
| M1.0 | 06:35 | 06:58 | 07:08 | — |
| C2.2 | 04:14 | 04:43 | 04:58 | — |