Solar activity forecast for the period August 20 - 21, 2017


Issued: 2017 August 19 17:15 UTC


Analysis from August 18/1700 UTC to August 19/1700 UTC:

Sunspot Regions on the Disk 19/1629 UTC (SDO Continuum): 1
The Largest Event: C4.4 at 18/2002 UTC
X-ray background flux (1.0-8.0 A) August 18: B1.3
Radio Flux 10.7 cm at 18/2300 UTC (Penticton): 82
Solar Wind Speed at 19/1645 UTC: 714.2 km/s, Density: 2.7 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 70, Class M: 15, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range B1.0 - B5.0
Radio Flux 10.7 cm: a fluctuation in the range 75 - 90

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