Solar activity forecast for the period April 18 - 19, 2017


Issued: 2017 April 17 17:15 UTC


Analysis from April 16/1700 UTC to April 17/1700 UTC:

Sunspot Regions on the Disk 17/1623 UTC (SDO Continuum): 2
The Largest Event: C2.0 at 17/0247 UTC
X-ray background flux (1.0-8.0 A) April 16: A7.7
Radio Flux 10.7 cm at 16/2300 UTC (Penticton): 75
Solar Wind Speed at 17/1645 UTC: 323.0 km/s, Density: 3.7 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 50, Class M: 10, 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 65 - 85

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