Solar activity forecast for the period September 14 - 15, 2017


Issued: 2017 September 13 17:15 UTC


Analysis from September 12/1700 UTC to September 13/1700 UTC:

Sunspot Regions on the Disk 13/1641 UTC (SDO Continuum): 1
The Largest Event: C1.6 from Region 2680 at 12/1920
X-ray background flux (1.0-8.0 A) September 12: A8.3
Radio Flux 10.7 cm at 12/2300 UTC (Penticton): 76
Solar Wind Speed at 13/1645 UTC: 392.4 km/s, Density: 6.0 p/cm^3


Forecast:
 
activity level will be very low to low 
Event probabilities: Class C: 20, Class M: 01, Class X: 01, Proton: 95
X-ray background flux (1.0-8.0 A): in the range A4.5 - A9.0
Radio Flux 10.7 cm: a fluctuation in the range 70-80

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