Solar activity forecast for the period August 11 - August 17, 2017


Activity level: mostly very low
X-ray background flux (1.0-8.0 A): in the range A3.0-A8.5
Radio flux (10.7 cm): a fluctuation in the range 66-78 f.u.
Events: class C (0-2/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-45

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


Geomagnetic activity forecast for the period August 11 - August 17, 2017


Quiet: Aug 11 - 12, 16 - 17
Unsettled: Aug 12 - 14, 17
Active:    Aug 12 - 13
Minor storm: unlikely Aug 13
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Currently, local geomagnetic field is quiet.
We expect quiet to unsettled conditions till Saturday, August 12. Evenings
of this day, the active event can start. Sunday, August 13, we expect at
most unsettled conditions with possible active event. Monday, August 14,
we expect at most unsettled conditions and geomagnetic activity decrease
to quiet to unsettled conditions. This level is expected to the end of
current forecasted period.

Tomas Bayer
RWC Prague
Institute of Geophysics of the ASCR, Prague
Department of Geomagnetism
Budkov observatory (BDV)


Geomagnetic activity forecast for the period August 11 - September 6, 2017


Geomagnetic field will be: 
quiet on August 15 - 16, 25 - 27, 29 
mostly quiet on August 11, 28, 30, September 5 - 6 
quiet to unsettled August 21, 24, September 3 - 4 
quiet to active on August 12, 14, 17 - 23, 31 
active to disturbed on August 13, September 1 - 2 
 
Amplifications of the solar wind from coronal holes are expected 
on August 14 - 23, 28, 30 - 31.
 
Remarks:
- Parenthesis means lower probability of activity enhancement 
and/or lower reliability of prediction. 
- A next our Geomagnetic activity forecast will be issued on 
August 31, because of the author's participation on the expedition. 
Contrary to the ancient times when our publishing began, there 
are other relatively reliable and usable resources today. 

F. K. Janda, OK1HH 
Czech Propagation Interested Group 
OK1HH compiling weekly forecasts since January 1978 
e-mail: ok1hh(at)rsys.cz