Solar flares on December 28, 2025
The most powerful solar flare in 24 hours
M4.2 (strong) flare - December 28 at 11:39 PM
Solar activity index
Value as of the end of the day on December 28, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 27, 2025 to December 28, 2025
Time zone — UTC+01 (Prague)
List of solar flares for December 28, 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 |
|---|---|---|---|---|
| M4.2 | 23:01 | 23:39 | 23:54 | 4317 |
| C6.8 | 22:48 | 22:53 | 22:56 | 4318 |
| M1.3 | 22:03 | 22:13 | 22:23 | 4325 |
| C4.0 | 20:17 | 21:08 | 21:40 | 4325 |
| C2.9 | 16:02 | 16:09 | 16:16 | 4325 |
| C2.8 | 12:57 | 13:08 | 13:21 | 4324 |
| C3.2 | 09:09 | 09:20 | 09:34 | 4321 |
| C4.0 | 08:22 | 08:28 | 08:35 | 4324 |
| C3.3 | 06:57 | 07:08 | 07:10 | 4324 |
| C2.6 | 06:35 | 06:39 | 06:57 | 4324 |