Solar activity forecast for the period September 3 - 4, 2017


Issued: 2017 September 2 17:15 UTC


Analysis from September 01/1700 UTC to September 02/1700 UTC:

Sunspot Regions on the Disk 02/1623 UTC (SDO Continuum): 5
The Largest Event: C7.7 from Region 2672 at 02/1541 UTC
X-ray background flux (1.0-8.0 A) September 1: B2.4
Radio Flux 10.7 cm at 01/2300 UTC (Penticton): 94
Solar Wind Speed at 02/1645 UTC: 594.7 km/s, Density: 1.9 p/cm^3


Forecast:
 
activity level will be low  
Event probabilities: Class C: 65, Class M: 10, 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 87 - 99

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