Solar activity forecast for the period September 29 - 30, 2017


Issued: 2017 September 28 17:15 UTC


Analysis from September 27/1700 UTC to September 28/1700 UTC:

Sunspot Regions on the Disk 28/1623 UTC (SDO Continuum): 4
The Largest Event: B2.1 at 27/1750
X-ray background flux (1.0-8.0 A) September 27: invalid data
Radio Flux 10.7 cm at 27/2300 UTC (Penticton): 89
Solar Wind Speed at 28/1645 UTC: 657.2 km/s, Density: 1.2 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 25, 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 82-98

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