Solar activity forecast for the period July 15 - July 16, 2025

Issued: 2025 July 14 17:00 UTC


Analysis from July 13/1700 UTC to July 14/1700 UTC:

Sunspot Regions on the Disk 14/1409 UTC (SDO Continuum): 10
The Largest Event: C8.9 from Region 4140 at 13/2150 UT
X-ray background flux (1.0-8.0 A) July 13: B8.0
Radio Flux 10.7 cm at 13/2300 UTC (Penticton): 130
Solar Wind Speed at 14/1645 UTC: 529.4 km/s, Density: 0.1 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 90, Class M: 40, Class X: 10, Proton: 05
X-ray background flux (1.0-8.0 A): in the range B7.0-C1.1
Radio Flux 10.7 cm: a fluctuation in the range 115-140

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