Solar activity forecast for the period April 29 - April 30, 2025

Issued: 2025 April 28 17:00 UTC


Analysis from April 27/1700 UTC to April 28/1700 UTC:

Sunspot Regions on the Disk 28/0615 UTC (SDO Continuum): 8
The Largest Event: C2.3 from Region 4067 at 28/0602 UT
X-ray background flux (1.0-8.0 A) April 27: B9.2
Radio Flux 10.7 cm at 27/2300 UTC (Penticton): 154
Solar Wind Speed at 28/1645 UTC: 373.3 km/s, Density: 4.3 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 80, Class M: 35, 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 142-166

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