Issued: 2026 September 11 17:00 UTC


Analysis from September 10/1700 UTC to September 11/1700 UTC:

Sunspot Regions on the Disk 11/1315 UTC (SDO Continuum): 7
The Largest Event: C1.6 from region 4530 at 10/1712 UT
X-ray background flux (1.0-8.0 A) September 10: B3.3
Radio Flux 10.7 cm at 10/2300 UTC (Penticton): 113
Solar Wind Speed at 11/1645 UTC: 436.5 km/s, density : 1.7 p/cm^3


Forecast:

Activity level will be: low - explanation
Event probabilities: Class C: 55%, Class M: 10%, Class X: 01%, Proton: 01%
X-ray background flux (1.0-8.0 A): in the range B2.5-B3.5
Radio Flux 10.7 cm: a fluctuation in the range 101-125

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