Solar activity forecast for the period February 20 - 21, 2017


Issued: 2017 February 19 17:30 UTC


Analysis from February 18/1700 UTC to February 19/1715 UTC:

Sunspot Regions on the Disk 19/1641 UTC (SDO Continuum): 3
The Largest Event: B3.0 at 19/0541 UTC
X-ray background flux (1.0-8.0 A) February 18: B1.0
Radio Flux 10.7 cm at 18/2300 UTC (Penticton): 77
Solar Wind Speed at 19/1700 UTC: 542.3 km/s, Density: 2.2 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 20, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A8.5 - B2.0
Radio Flux 10.7 cm: a fluctuation in the range 73 - 81

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