Solar activity forecast for the period April 28 - 29, 2017


Issued: 2017 April 27 17:15 UTC


Analysis from April 26/1700 UTC to April 27/1700 UTC:

Sunspot Regions on the Disk 27/1623 UTC (SDO Continuum): 3
The Largest Event: B4.5 at 26/1748 UTC
X-ray background flux (1.0-8.0 A) April 26: A9.5
Radio Flux 10.7 cm at 26/2300 UTC (Penticton): 79
Solar Wind Speed at 27/1645 UTC: 421.8 km/s, Density: 0.9 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 72 - 86

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