Solar activity forecast for the period January 21 - 22, 2017


Issued: 2017 January 20 17:15 UTC


Analysis from January 19/1700 UTC to January 20/1700 UTC:

Sunspot Regions on the Disk 20/1641 UTC (SDO Continuum): 4
The Largest Event: B5.3 at 20/1052 UTC
X-ray background flux (1.0-8.0 A) January 19: A7.1
Radio Flux 10.7 cm at 19/2300 UTC (Penticton): 80
Solar Wind Speed at 20/1645 UTC: 508.6 km/s, Density: 2.1 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 A6.0 - A9.5
Radio Flux 10.7 cm: a fluctuation in the range 77 - 83

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