Solar activity forecast for the period July 21 - 22, 2017


Issued: 2017 July 20 17:15 UTC


Analysis from July 19/1700 UTC to July 20/1700 UTC:

Sunspot Regions on the Disk 20/1623 UTC (SDO Continuum): 0
The Largest Event: no X-ray event
X-ray background flux (1.0-8.0 A) July 19: B1.5
Radio Flux 10.7 cm at 19/2300 UTC (Penticton): 73
Solar Wind Speed at 20/1615 UTC: 411.9 km/s, Density: 6.3 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 A9.0 - B2.5
Radio Flux 10.7 cm: a fluctuation in the range 67 - 78

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