Solar flares — Dec 16, 2025
The strongest solar flare in the day
Flare of C3.0 level (normal) — in 04:17
Solar activity index
Value for Dec 16, 2025 24:00 (end on the day). The maximum value is 10.0
Solar flares in 2 days
Chart of solar activity from Dec 15, 2025 to Dec 16, 2025
Time zone — UTC+00 (London)
This chart in PNG format — high resolution
API data: JSON or TXT
List of solar flares for Dec 16, 2025
Total number of flares of class C and higher — 4 flares
C type — 4 | M type — 0 | X type — 0
| start | maximum | end | region | |
|---|---|---|---|---|
|
C1.1
|
17:46 | 17:59 | 18:06 | — |
|
C1.9
|
13:47 | 13:51 | 13:55 | — |
|
C1.5
|
13:36 | 13:43 | 13:47 | — |
|
C3.0
|
03:58 | 04:17 | 04:26 | — |