Solar activity forecast for the period April 27 - 28, 2017


Issued: 2017 April 26 17:15 UTC


Analysis from April 25/1700 UTC to April 26/1700 UTC:

Sunspot Regions on the Disk 26/1623 UTC (SDO Continuum): 3
The Largest Event: B7.2 at 25/2025 UTC
X-ray background flux (1.0-8.0 A) April 25: A9.2
Radio Flux 10.7 cm at 25/2300 UTC (Penticton): 81
Solar Wind Speed at 26/1645 UTC: 505.4 km/s, Density: 1.3 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 A8.0 - B2.5
Radio Flux 10.7 cm: a fluctuation in the range 74 - 88

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