Solar activity forecast for the period September 4 - 5, 2017


Issued: 2017 September 3 17:15 UTC


Analysis from September 02/1700 UTC to September 03/1700 UTC:

Sunspot Regions on the Disk 03/1623 UTC (SDO Continuum): 5
The Largest Event: C1.5 from Region 2672 at 02/2203 UTC
                   C1.0 from Region 2674 at 03/0441 UTC
X-ray background flux (1.0-8.0 A) September 2: B2.3
Radio Flux 10.7 cm at 02/2300 UTC (Penticton): 104
Solar Wind Speed at 03/1645 UTC: 476.2 km/s, Density: 2.1 p/cm^3


Forecast:
 
activity level will be low  
Event probabilities: Class C: 80, Class M: 15, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range B1.0 - B5.5
Radio Flux 10.7 cm: a fluctuation in the range 92 - 110

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