Solar activity forecast for the period June 02 - June 03, 2026

Issued: 2026 June 01 17:00 UTC


Analysis from May 31/1700 UTC to June 01/1700 UTC:

Sunspot Regions on the Disk 01/1623 UTC (SDO Continuum): 9
The Largest Event: C1.9 from Region N21E89 at 31/2153 UT
X-ray background flux (1.0-8.0 A) May 31: B8.1
Radio Flux 10.7 cm at 31/2300 UTC (Penticton): 136
Solar Wind Speed at 01/1645 UTC: 404.2 km/s, Density: 1.5 p/cm^3


Forecast:

activity level will be low to moderate
Event probabilities: Class C: 99, Class M: 45, 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 132-138

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