Issued: 2026 August 17 17:00 UTC


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

Sunspot Regions on the Disk 17/1445 UTC (SDO Continuum): 5
The Largest Event: C8.2 from region 4506 at 16/1928 UT
X-ray background flux (1.0-8.0 A) August 16: B7.5
Radio Flux 10.7 cm at 16/2300 UTC (Penticton): 122
Solar Wind Speed at 17/1645 UTC: 349.7 km/s, density : 5.4 p/cm^3


Forecast:

Activity level will be: low - explanation
Event probabilities: Class C: 99%, Class M: 45%, Class X: 15%, Proton: 10%
X-ray background flux (1.0-8.0 A): in the range B5.5-B6.5
Radio Flux 10.7 cm: a fluctuation in the range 110-134

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