Solar activity forecast for the period September 27 - 28, 2017


Issued: 2017 September 26 17:15 UTC


Analysis from September 25/1700 UTC to September 26/1700 UTC:

Sunspot Regions on the Disk 26/1629 UTC (SDO Continuum): 3
The Largest Event: C1.8 from Region 2683 at 26/0234
X-ray background flux (1.0-8.0 A) September 25: B1.1
Radio Flux 10.7 cm at 25/2300 UTC (Penticton): 91
Solar Wind Speed at 26/1645 UTC: 317.8 km/s, Density: 4.0 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 35, 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 85-98

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