Solar flares on December 4, 2025
The most powerful solar flare in 24 hours
M6.0 (strong) flare - December 4 at 2:50 AM
Solar activity index
Value as of the end of the day on December 4, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 3, 2025 to December 4, 2025
Time zone — UTC+00 (London)
List of solar flares for December 4, 2025
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C6.8 | 23:18 | 23:24 | 23:31 | 4296 |
| C3.7 | 23:13 | 23:16 | 23:18 | 4296 |
| C3.6 | 19:15 | 19:20 | 19:23 | 4298 |
| C3.3 | 19:00 | 19:09 | 19:15 | 4298 |
| C3.4 | 18:12 | 18:19 | 18:27 | 4296 |
| C3.8 | 18:00 | 18:05 | 18:08 | 4294 |
| M6.0 | 02:36 | 02:50 | 02:59 | 4300 |
| C9.2 | 00:11 | 00:16 | 00:19 | 4296 |