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


Issued: 2017 February 21 17:30 UTC


Analysis from February 20/1700 UTC to February 21/1715 UTC:

Sunspot Regions on the Disk 21/1641 UTC (SDO Continuum): 1
The Largest Event: B3.0 at 21/0522 UTC
X-ray background flux (1.0-8.0 A) February 20: B1.2
Radio Flux 10.7 cm at 20/2300 UTC (Penticton): 80
Solar Wind Speed at 21/1700 UTC: 433.1 km/s, Density: 5.0 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 76 - 84

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