Solar activity forecast for the period April 4 - 5, 2017


Issued: 2017 April 3 17:15 UTC


Analysis from April 02/1700 UTC to April 03/1700 UTC:

Sunspot Regions on the Disk 03/1623 UTC (SDO Continuum): 4
The Largest Event: M5.7 from Region 2644 at 02/2033 UTC
                   M1.2 from Region 2644 at 03/0105 UTC
                   M5.8 from Region 2644 at 03/1429 UTC
X-ray background flux (1.0-8.0 A) April 2: B7.9
Radio Flux 10.7 cm at 02/2300 UTC (Penticton): 107
Solar Wind Speed at 03/1645 UTC: 412.0 km/s, Density: 2.2 p/cm^3


Forecast:
 
activity level will be low to high
Event probabilities: Class C: 99, Class M: 40, Class X: 15, Proton: 10
X-ray background flux (1.0-8.0 A): in the range B5.0 - C2.0
Radio Flux 10.7 cm: a fluctuation in the range 97 - 117

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