Solar activity forecast for the period July 14 - July 15, 2025

Issued: 2025 July 13 17:00 UTC


Analysis from July 12/1700 UTC to July 13/1700 UTC:

Sunspot Regions on the Disk 13/1526 UTC (SDO Continuum): 7
The Largest Event: C8.9 from Region 4140 at 13/0402 UT
X-ray background flux (1.0-8.0 A) July 12: C1.0
Radio Flux 10.7 cm at 12/2300 UTC (Penticton): 137
Solar Wind Speed at 13/1645 UTC: 573.2 km/s, Density: 0.8 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 90, Class M: 45, Class X: 15, Proton: 10
X-ray background flux (1.0-8.0 A): in the range B8.0-C1.5
Radio Flux 10.7 cm: a fluctuation in the range 120-150

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