Solar activity forecast for the period September 13 - 14, 2017


Issued: 2017 September 12 17:15 UTC


Analysis from September 11/1700 UTC to September 12/1700 UTC:

Sunspot Regions on the Disk 12/1623 UTC (SDO Continuum): 1
The Largest Event: C3.0 from Region 2680 at 12/0727
X-ray background flux (1.0-8.0 A) September 11: B2.6
Radio Flux 10.7 cm at 11/2300 UTC (Penticton): 79
Solar Wind Speed at 12/1645 UTC: 459.2 km/s, Density: 3.4 p/cm^3


Forecast:
 
activity level will be very low to low 
Event probabilities: Class C: 25, Class M: 01, Class X: 01, Proton: 95
X-ray background flux (1.0-8.0 A): in the range A8.5 - B2.5
Radio Flux 10.7 cm: a fluctuation in the range 70-85

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