Solar activity forecast for the period April 12 - 13, 2017


Issued: 2017 April 11 17:15 UTC


Analysis from April 10/1700 UTC to April 11/1700 UTC:

Sunspot Regions on the Disk 11/1623 UTC (SDO Continuum): 1
The Largest Event: B4.8 at 10/1823 UTC
X-ray background flux (1.0-8.0 A) April 10: A5.8
Radio Flux 10.7 cm at 10/2300 UTC (Penticton): 73
Solar Wind Speed at 11/1645 UTC: 476.0 km/s, Density: 2.6 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 A4.5 - A9.5
Radio Flux 10.7 cm: a fluctuation in the range 68 - 78

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