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


Issued: 2017 October 18 17:15 UTC


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

Sunspot Regions on the Disk 18/1623 UTC (SDO Continuum): 0
The Largest Event: no X-ray event
X-ray background flux (1.0-8.0 A) October 17: A4.1
Radio Flux 10.7 cm at 17/2300 UTC (Penticton): 72
Solar Wind Speed at 18/1645 UTC:356.5 km/s, Density: 6.1 p/cm^3


Forecast:
 
activity level will be very low
Event probabilities: Class C: 05, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A4.0 - A8.0
Radio Flux 10.7 cm: a fluctuation in the range 69-75

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