Solar activity forecast for the period October 22 - 23, 2017


Issued: 2017 October 21 17:15 UTC


Analysis from October 20/1700 UTC to October 21/1700 UTC:

Sunspot Regions on the Disk 21/1623 UTC (SDO Continuum): 1
The Largest Event: M1.1 from Region 2685 at 20/2328 UTC
X-ray background flux (1.0-8.0 A) October 20: A6.6
Radio Flux 10.7 cm at 20/2300 UTC (Penticton): 76
Solar Wind Speed at 21/1645 UTC: 401.1 km/s, Density: 8.6 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 50, Class M: 15, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A4.5 - A8.5
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