Solar activity forecast for the period April 29 - 30, 2017


Issued: 2017 April 28 17:15 UTC


Analysis from April 27/1700 UTC to April 28/1700 UTC:

Sunspot Regions on the Disk 28/1623 UTC (SDO Continuum): 4
The Largest Event: no X-ray events
X-ray background flux (1.0-8.0 A) April 27: A9.0
Radio Flux 10.7 cm at 27/2300 UTC (Penticton): 78
Solar Wind Speed at 28/1645 UTC: 378.1 km/s, Density: 1.6 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 15, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A7.5 - B1.0
Radio Flux 10.7 cm: a fluctuation in the range 71 - 85

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