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


Issued: 2017 March 20 18:30 UTC


Analysis from March 19/1700 UTC to March 20/1815 UTC:

Sunspot Regions on the Disk 20/1741 UTC (SDO Continuum): 0
The Largest Event: B1.5 at 20/1559 UTC
X-ray background flux (1.0-8.0 A) March 19: A0.0 (invalid data?)
Radio Flux 10.7 cm at 19/2300 UTC (Penticton): 71
Solar Wind Speed at 20/1800 UTC: 320.0 km/s, Density: 4.1 p/cm^3


Forecast:
 
activity level will be very low
Event probabilities: Class C: 01, Class M: 05, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A3.0 - A8.0
Radio Flux 10.7 cm: a fluctuation in the range 67 - 75

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