Solar activity forecast for the period June 18 - June 19, 2026

Issued: 2026 June 17 17:00 UTC


Analysis from June 16/1700 UTC to June 17/1700 UTC:

Sunspot Regions on the Disk 16/1623 UTC (SDO Continuum): 5
The Largest Event: C1.2 from Region 4465 at 17/1228 UT
X-ray background flux (1.0-8.0 A) June 16: B6.2
Radio Flux 10.7 cm at 16/2300 UTC (Penticton): 113
Solar Wind Speed at 17/1645 UTC: 0 km/s, Density: 0 p/cm^3


Forecast:

activity level will be low
Event probabilities: Class C: 70, Class M: 30, Class X: 05, Proton: 05
X-ray background flux (1.0-8.0 A): in the range B4.8 - B5.4
Radio Flux 10.7 cm: a fluctuation in the range 110-115

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