Solar activity forecast for the period August 19 - 20, 2017


Issued: 2017 August 18 17:15 UTC


Analysis from August 17/1700 UTC to August 18/1700 UTC:

Sunspot Regions on the Disk 18/1623 UTC (SDO Continuum): 1
The Largest Event: B9.5 from Region 2671 at 18/0852 UTC
X-ray background flux (1.0-8.0 A) August 17: A8.3
Radio Flux 10.7 cm at 17/2300 UTC (Penticton): 76
Solar Wind Speed at 18/1645 UTC: 544.8 km/s, Density: 2.7 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 50, Class M: 10, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A9.0 - B4.0
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