Solar activity forecast for the period August 16 - 17, 2017


Issued: 2017 August 15 18:45 UTC


Analysis from August 14/1700 UTC to August 15/1830 UTC:

Sunspot Regions on the Disk 15/1811 UTC (SDO Continuum): 1
The Largest Event: C1.2 from Region 2671 at 14/2104 UTC
                   C2.3 from Region 2671 at 14/2210 UTC
                   C1.0 from Region 2671 at 15/0215 UTC
                   C1.1 from Region 2671 at 15/1352 UTC
X-ray background flux (1.0-8.0 A) August 14: B1.0
Radio Flux 10.7 cm at 15/1700 UTC (Penticton): 77
Solar Wind Speed at 15/1815 UTC: 375.7 km/s, Density: 4.2 p/cm^3


Forecast:
 
activity level will be very low to low
Event probabilities: Class C: 40, Class M: 01, Class X: 01, Proton: 01
X-ray background flux (1.0-8.0 A): in the range A9.5 - B3.0
Radio Flux 10.7 cm: a fluctuation in the range 70 - 84

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