Solar activity forecast for the period December 26 - December 27, 2025

Issued: 2025 December 25 17:00 UTC


Analysis from December 24/1700 UTC to December 25/1700 UTC:

Sunspot Regions on the Disk 25/1142 UTC (SDO Continuum): 8
The Largest Event: C2.8 from Region 4317 at 24/2013 UT
X-ray background flux (1.0-8.0 A) December 24: C1.3
Radio Flux 10.7 cm at 24/2300 UTC (Penticton): 158
Solar Wind Speed at 25/1645 UTC: 528.9 km/s, Density: 1.5 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 99, Class M: 35, Class X: 10, Proton: 05
X-ray background flux (1.0-8.0 A): in the range C1.2-C1.8
Radio Flux 10.7 cm: a fluctuation in the range 145-165

Katerina Drdlova
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz