Solar activity forecast for the period July 20 - 21, 2017


Issued: 2017 July 19 17:15 UTC


Analysis from July 18/1700 UTC to July 19/1700 UTC:

Sunspot Regions on the Disk 19/1600 UTC (SDO Continuum): 0
The Largest Event: C2.8 from Region 2665 at 18/0007 UTC
X-ray background flux (1.0-8.0 A) July 18: B2.4
Radio Flux 10.7 cm at 18/2300 UTC (Penticton): 78
Solar Wind Speed at 19/1650 UTC: 412.5 km/s, Density: 1.5 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 30, Class M: 05, Class X: 01, Proton: 20
X-ray background flux (1.0-8.0 A): in the range B1.0 - B3.5
Radio Flux 10.7 cm: a fluctuation in the range 72 - 85

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