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: 0.0 km/s, density : 0.0 p/cm^3


Forecast:

Activity level will be: low - explanation
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