Solar activity forecast for the period September 24 - 25, 2017


Issued: 2017 September 23 17:15 UTC


Analysis from September 22/1700 UTC to September 23/1700 UTC:

Sunspot Regions on the Disk 23/1629 UTC (SDO Continuum): 1
The Largest Event: B3.0 at 23/0603
X-ray background flux (1.0-8.0 A) September 22: A3.7
Radio Flux 10.7 cm at 22/2300 UTC (Penticton): 78
Solar Wind Speed at 23/1645 UTC: 362.2 km/s, Density: 5.4 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 55, Class M: 15, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A7.5 - B3.5
Radio Flux 10.7 cm: a fluctuation in the range 74-84

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