Solar flares on December 15, 2025
The most powerful solar flare in 24 hours
C3.9 (normal) flare - December 15 at 5:28 PM
Solar activity index
Value as of the end of the day on December 15, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 14, 2025 to December 15, 2025
Time zone — UTC+00
List of solar flares for December 15, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 23:23 | 23:36 | 23:43 | 4307 |
| C3.9 | 17:20 | 17:28 | 17:49 | 4304 |
| C2.0 | 12:21 | 12:25 | 12:34 | 4304 |
| C1.3 | 11:52 | 12:05 | 12:15 | 4308 |
| C1.4 | 03:02 | 03:16 | 03:24 | 4307 |
| C1.8 | 01:40 | 01:48 | 01:56 | 4304 |
| C1.9 | 01:20 | 01:29 | 01:34 | 4307 |