Solar activity forecast for the period September 26 - 27, 2017


Issued: 2017 September 25 17:15 UTC


Analysis from September 24/1700 UTC to September 25/1700 UTC:

Sunspot Regions on the Disk 25/1629 UTC (SDO Continuum): 3
The Largest Event: B5.7 from Region 2681 at 25/0235
X-ray background flux (1.0-8.0 A) September 24: A9.7
Radio Flux 10.7 cm at 24/2300 UTC (Penticton): 87
Solar Wind Speed at 25/1645 UTC: 356.2 km/s, Density: 2.3 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 40, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A9.5 - B4.5
Radio Flux 10.7 cm: a fluctuation in the range 78-92

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