Solar activity forecast for the period September 28 - 29, 2017


Issued: 2017 September 27 17:15 UTC


Analysis from September 26/1700 UTC to September 27/1700 UTC:

Sunspot Regions on the Disk 27/1629 UTC (SDO Continuum): 3
The Largest Event: C1.7 from Region 2683 at 27/0101
X-ray background flux (1.0-8.0 A) September 26: B1.3
Radio Flux 10.7 cm at 26/2300 UTC (Penticton): 90
Solar Wind Speed at 27/1645 UTC: 649.3 km/s, Density: 2.2 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 30, Class M: 05, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A9.5 - B3.5
Radio Flux 10.7 cm: a fluctuation in the range 84-98

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