Solar activity forecast for the period April 12 - April 13, 2025

Issued: 2025 April 11 17:00 UTC


Analysis from April 10/1700 UTC to April 11/1700 UTC:

Sunspot Regions on the Disk 11/1445 UTC (SDO Continuum): 8
The Largest Event: C7.4 from Region 4055 at 11/1625 UT
X-ray background flux (1.0-8.0 A) April 10: B9.9
Radio Flux 10.7 cm at 10/2300 UTC (Penticton): -1
Solar Wind Speed at 11/1645 UTC: 437.5 km/s, Density: 1.1 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 99, Class M: 40, Class X: 20, Proton: 10
X-ray background flux (1.0-8.0 A): in the range B9.8-C1.5
Radio Flux 10.7 cm: a fluctuation in the range 158-182

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