Solar activity forecast for the period April 11 - 12, 2017


Issued: 2017 April 10 17:15 UTC


Analysis from April 09/1700 UTC to April 10/1700 UTC:

Sunspot Regions on the Disk 10/1623 UTC (SDO Continuum): 1
The Largest Event: B2.7 at 10/0436 UTC
X-ray background flux (1.0-8.0 A) April 9: A7.2
Radio Flux 10.7 cm at 09/2300 UTC (Penticton): 74
Solar Wind Speed at 10/1645 UTC: 439.2 km/s, Density: 8.0 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 20, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A5.0 - A9.5
Radio Flux 10.7 cm: a fluctuation in the range 64 - 84

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