Solar activity forecast for the period June 03 - June 04, 2026

Issued: 2026 June 02 17:00 UTC


Analysis from June 01/1700 UTC to June 02/1700 UTC:

Sunspot Regions on the Disk 02/1623 UTC (SDO Continuum): 9
The Largest Event: M3.3 from Region 14455 at 02/1650 UT
X-ray background flux (1.0-8.0 A) June 01: B7.1
Radio Flux 10.7 cm at 01/2300 UTC (Penticton): 133
Solar Wind Speed at 02/1645 UTC: 383.3 km/s, Density: 3.5 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 99, Class M: 55, Class X: 10, Proton: 10
X-ray background flux (1.0-8.0 A): in the range B7.2-B8.0
Radio Flux 10.7 cm: a fluctuation in the range 136-140

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