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


Issued: 2017 July 18 17:15 UTC


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

Sunspot Regions on the Disk 18/1629 UTC (SDO Continuum): 1
The Largest Event: C2.1 from Region 2665 at 18/0040 UTC
X-ray background flux (1.0-8.0 A) July 17: B2.0
Radio Flux 10.7 cm at 17/2300 UTC (Penticton): 84
Solar Wind Speed at 18/1650 UTC: 556.4 km/s, Density: 0.1 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 50, Class M: 10, Class X: 01, Proton: 20
X-ray background flux (1.0-8.0 A): in the range B1.0 - B3.0
Radio Flux 10.7 cm: a fluctuation in the range 78 - 90

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