Solar activity forecast for the period May 31 - June 01, 2025

Issued: 2025 May 30 17:00 UTC


Analysis from May 29/1700 UTC to May 30/1700 UTC:

Sunspot Regions on the Disk 30/1415 UTC (SDO Continuum): 6
The Largest Event: M3.4 from Region 4100 at 30/0613 UT
X-ray background flux (1.0-8.0 A) May 29: B8.0
Radio Flux 10.7 cm at 29/2300 UTC (Penticton): 146
Solar Wind Speed at 30/1646 UTC: 750.9 km/s, Density: 1.4 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 99, Class M: 75, Class X: 45, Proton: 10
X-ray background flux (1.0-8.0 A): in the range B9.5-C1.5
Radio Flux 10.7 cm: a fluctuation in the range 138-154

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