Solar flares on December 28, 2025
The most powerful solar flare in 24 hours
M4.2 (strong) flare - December 28 at 5:39 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-05 (Quebec)
List of solar flares for December 28, 2025
The total number of solar flares of class C and higher — 13 flares
C class — 10 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C8.9 | 21:58 | 22:05 | 22:10 | 4317 |
| C4.8 | 20:19 | 20:28 | 20:32 | 4325 |
| M2.2 | 18:57 | 19:02 | 19:07 | 4324 |
| M4.2 | 17:01 | 17:39 | 17:54 | 4317 |
| C6.8 | 16:48 | 16:53 | 16:56 | 4318 |
| M1.3 | 16:03 | 16:13 | 16:23 | 4325 |
| C4.0 | 14:17 | 15:08 | 15:40 | 4325 |
| C2.9 | 10:02 | 10:09 | 10:16 | 4325 |
| C2.8 | 06:57 | 07:08 | 07:21 | 4324 |
| C3.2 | 03:09 | 03:20 | 03:34 | 4321 |
| C4.0 | 02:22 | 02:28 | 02:35 | 4324 |
| C3.3 | 00:57 | 01:08 | 01:10 | 4324 |
| C2.6 | 00:35 | 00:39 | 00:57 | 4324 |