Solar activity forecast for the period April 9 - 10, 2017


Issued: 2017 April 8 17:15 UTC


Analysis from April 07/1700 UTC to April 08/1700 UTC:

Sunspot Regions on the Disk 08/1623 UTC (SDO Continuum): 0
The Largest Event: C4.3 from Region 2645 at 07/1949 UTC
X-ray background flux (1.0-8.0 A) April 7: A9.4
Radio Flux 10.7 cm at 07/2300 UTC (Penticton): 67
Solar Wind Speed at 08/1645 UTC: 533.6 km/s, Density: 1.0 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 A7.0 - B2.0
Radio Flux 10.7 cm: a fluctuation in the range 57 - 77

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