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


Issued: 2017 July 21 17:15 UTC


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

Sunspot Regions on the Disk 21/1629 UTC (SDO Continuum): 0
The Largest Event: no X-ray event
X-ray background flux (1.0-8.0 A) July 20: A8.8
Radio Flux 10.7 cm at 20/2300 UTC (Penticton): 70
Solar Wind Speed at 21/1645 UTC: 660.7 km/s, Density: 0.7 p/cm^3


Forecast:
 
activity level will be very low
Event probabilities: Class C: 01, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A3.0 - A9.0
Radio Flux 10.7 cm: a fluctuation in the range 66 - 77

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