Solar activity forecast for the period April 23 - 24, 2017


Issued: 2017 April 22 17:15 UTC


Analysis from April 21/1700 UTC to April 22/1700 UTC:

Sunspot Regions on the Disk 22/1623 UTC (SDO Continuum): 2
The Largest Event: B9.6 at 22/0034 UTC
X-ray background flux (1.0-8.0 A) April 21: B1.1
Radio Flux 10.7 cm at 21/2300 UTC (Penticton): 83
Solar Wind Speed at 22/1645 UTC: 698.3 km/s, Density: 2.3 p/cm^3


Forecast:
 
activity level will be low
Event probabilities: Class C: 40, Class M: 05, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A7.5 - B2.5
Radio Flux 10.7 cm: a fluctuation in the range 73 - 93

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