Solar activity forecast for the period June 17 - June 18, 2025

Issued: 2025 June 16 17:00 UTC


Analysis from June 15/1700 UTC to June 16/1700 UTC:

Sunspot Regions on the Disk 16/0607 UTC (SDO Continuum): 8
The Largest Event: M8.5 from Region 4114 at 15/1807 UT
X-ray background flux (1.0-8.0 A) June 15: C1.8
Radio Flux 10.7 cm at 15/2300 UTC (Penticton): 154
Solar Wind Speed at 16/1645 UTC: 476 km/s, Density: 1.9 p/cm^3


Forecast:

activity level will be moderate
Event probabilities: Class C: 99, Class M: 65, Class X: 35, Proton: 20
X-ray background flux (1.0-8.0 A): in the range C1.6-C2.2
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