Solar activity forecast for the period January 22 - 23, 2018


Issued: 2018 January 21 23:15 UTC
                         
                         
Analysis from January 20/1700 UTC to January 21/2300 UTC: 

Sunspot Regions on the Disk 21/2252 UTC (SDO Continuum): 0
The Largest Event: A9.1 at 20/1752 UTC
X-ray background flux (1.0-8.0 A) January 20: A3.1
Radio Flux 10.7 cm at 21/2000 UTC (Penticton): 68
Solar Wind Speed at 21/2110 UTC: 481.9 km/s, Density: 2.5 p/cm^3


Forecast:
 
activity level will be very low 
Event probabilities: Class C: 01, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A2.5 - A3.5
Radio Flux 10.7 cm: a fluctuation in the range 66-70

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