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


Issued: 2017 February 20 17:30 UTC


Analysis from February 19/1700 UTC to February 20/1715 UTC:

Sunspot Regions on the Disk 20/1641 UTC (SDO Continuum): 2
The Largest Event: B7.5 at 20/1425 UTC
X-ray background flux (1.0-8.0 A) February 19: B1.4
Radio Flux 10.7 cm at 19/2300 UTC (Penticton): 78
Solar Wind Speed at 20/1700 UTC: 489.9 km/s, Density: 1.7 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 A8.5 - B2.0
Radio Flux 10.7 cm: a fluctuation in the range 74 - 82

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