Solar activity forecast for the period May 30 - May 31, 2025

Issued: 2025 May 29 17:00 UTC


Analysis from May 28/1700 UTC to May 29/1700 UTC:

Sunspot Regions on the Disk 29/1400 UTC (SDO Continuum): 6
The Largest Event: C7.0 from Region 4100 at 29/0251 UT
X-ray background flux (1.0-8.0 A) May 28: B8.4
Radio Flux 10.7 cm at 28/2300 UTC (Penticton): 142
Solar Wind Speed at 29/1445 UTC: 707.7 km/s, Density: 1.9 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 99, Class M: 45, Class X: 15, Proton: 05
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 130-154

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