Solar activity forecast for the period April 3 - 4, 2017


Issued: 2017 April 2 17:15 UTC


Analysis from April 01/1700 UTC to April 02/1700 UTC:

Sunspot Regions on the Disk 02/1623 UTC (SDO Continuum): 4
The Largest Event: M4.4 from Region 2644 at 01/2148 UTC
                   M5.3 from Region 2644 at 02/0802 UTC
                   M2.3 from Region 2644 at 02/1300 UTC
X-ray background flux (1.0-8.0 A) April 1: B2.0
Radio Flux 10.7 cm at 01/2300 UTC (Penticton): 100
Solar Wind Speed at 02/1645 UTC: 465.8 km/s, Density: 4.3 p/cm^3


Forecast:
 
activity level will be moderate to very high
Event probabilities: Class C: 99, Class M: 60, Class X: 20, Proton: 20
X-ray background flux (1.0-8.0 A): in the range B1.0 - B9.5
Radio Flux 10.7 cm: a fluctuation in the range 90 - 110

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