Solar activity forecast for the period January 22 - 23, 2017


Issued: 2017 January 21 17:15 UTC


Analysis from January 20/1700 UTC to January 21/1700 UTC:

Sunspot Regions on the Disk 21/1629 UTC (SDO Continuum): 4
The Largest Event: C9.3 from Region 2628 at 21/0726 UTC
X-ray background flux (1.0-8.0 A) January 20: B1.0
Radio Flux 10.7 cm at 20/2300 UTC (Penticton): 84
Solar Wind Speed at 21/1645 UTC: 485.8 km/s, Density: 3.6 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 30, Class M: 10, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A8.0 - B2.0
Radio Flux 10.7 cm: a fluctuation in the range 80 - 88

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