Solar activity forecast for the period August 23 - 24, 2017


Issued: 2017 August 22 17:15 UTC


Analysis from August 21/1700 UTC to August 22/1700 UTC:

Sunspot Regions on the Disk 22/1623 UTC (SDO Continuum): 2
The Largest Event: C3.0 from Region 2672 at 21/1757 UTC
X-ray background flux (1.0-8.0 A) August 21: B2.6
Radio Flux 10.7 cm at 21/2300 UTC (Penticton): 91
Solar Wind Speed at 22/1645 UTC: 533.9 km/s, Density: 7.9 p/cm^3


Forecast:
 
activity level will be low to moderate
Event probabilities: Class C: 75, Class M: 25, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A9.5 - B5.5
Radio Flux 10.7 cm: a fluctuation in the range 85 - 98

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