Solar activity forecast for the period September 5 - 6, 2017


Issued: 2017 September 4 17:15 UTC


Analysis from September 03/1700 UTC to September 04/1700 UTC:

Sunspot Regions on the Disk 04/1623 UTC (SDO Continuum): 5
The Largest Event: M1.2 from Region 2673 at 04/0549 UTC
                   M1.5 from Region 2673 at 04/1530 UTC
X-ray background flux (1.0-8.0 A) September 3: B3.3
Radio Flux 10.7 cm at 03/2300 UTC (Penticton): 123
Solar Wind Speed at 04/1645 UTC: 471.5 km/s, Density: 6.8 p/cm^3


Forecast:
 
activity level will be low to high
Event probabilities: Class C: 99, Class M: 45, Class X: 10, Proton: 01
X-ray background flux (1.0-8.0 A): in the range B9.0 - C3.0
Radio Flux 10.7 cm: a fluctuation in the range 110 - 132

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