Solar activity forecast for the period June 16 - June 17, 2025

Issued: 2025 June 15 17:00 UTC


Analysis from June 14/1700 UTC to June 15/1700 UTC:

Sunspot Regions on the Disk 15/1543 UTC (SDO Continuum): 9
The Largest Event: M6.8 from Region 4105 at 14/2301 UT
X-ray background flux (1.0-8.0 A) June 14: C1.6
Radio Flux 10.7 cm at 14/2300 UTC (Penticton): 156
Solar Wind Speed at 15/1645 UTC: 457.4 km/s, Density: 2.1 p/cm^3


Forecast:

activity level will be moderate
Event probabilities: Class C: 99, Class M: 55, Class X: 25, Proton: 20
X-ray background flux (1.0-8.0 A): in the range C1.4-C2.0
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