Solar flares on December 15, 2025
The most powerful solar flare in 24 hours
C3.9 (normal) flare - December 15 at 11:28 AM
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-06 (Topeka)
List of solar flares for December 15, 2025
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.0 | 21:58 | 22:17 | 22:26 | — |
| C1.3 | 17:23 | 17:36 | 17:43 | 4307 |
| C3.9 | 11:20 | 11:28 | 11:49 | 4304 |
| C2.0 | 06:21 | 06:25 | 06:34 | 4304 |
| C1.3 | 05:52 | 06:05 | 06:15 | 4308 |