Solar activity forecast for the period August 18 - August 24, 2017


Activity level: mostly low
X-ray background flux (1.0-8.0 A): in the range A8.0-B4.0
Radio flux (10.7 cm): a fluctuation in the range 72-90 f.u.
Events: class C (0-6/day), class M (0-5/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 11-70

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


Geomagnetic activity forecast for the period August 18 - August 24, 2017


Quiet: Aug 22 - 24
Unsettled: Aug 20 - 22
Active:    Aug 18 - 19
Minor storm: Aug 18
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
We expect an active / minor storming episode within the nearest 24 hours.
We expect the active conditions August 18-19, Friday (August 18), the
K-index can reach to 5 (minor storming event). Saturday, August 19, we
expect at most unsettled to active conditions.
Next two days August (20-21), we expect at most unsettled conditions only
with one isolated active event.
The rest of forecated week (August 22-24), we expect quiet to unsettled
conditions.

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


Geomagnetic activity forecast for the period August 18 - September 13, 2017


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