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


Issued: 2017 May 19 17:15 UTC


Analysis from May 18/1700 UTC to May 19/1700 UTC:

Sunspot Regions on the Disk 19/1623 UTC (SDO Continuum): 2
The Largest Event: no X-ray event
X-ray background flux (1.0-8.0 A) May 18: A5.4
Radio Flux 10.7 cm at 18/2300 UTC (Penticton): 72
Solar Wind Speed at 19/1645 UTC: 445.8 km/s, Density: 7.0 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 10, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A4.5 - A7.5
Radio Flux 10.7 cm: a fluctuation in the range 67 - 79

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