Solar activity forecast for the period August 21 - 22, 2017


Issued: 2017 August 20 17:15 UTC


Analysis from August 19/1700 UTC to August 20/1700 UTC:

Sunspot Regions on the Disk 20/1641 UTC (SDO Continuum): 2
The Largest Event: M1.1 from Region 2672 at 20/0152 UTC
X-ray background flux (1.0-8.0 A) August 19: B3.3
Radio Flux 10.7 cm at 19/2300 UTC (Penticton): 89
Solar Wind Speed at 20/1645 UTC: 668.4 km/s, Density: 1.1 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 B1.5 - B6.0
Radio Flux 10.7 cm: a fluctuation in the range 80 - 95

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