Solar activity forecast for the period July 14 - July 20, 2017


Activity level: mostly low
X-ray background flux (1.0-8.0 A): in the range A7.0-B2.5
Radio flux (10.7 cm): a fluctuation in the range 70-95 f.u.
Events: class C (0-8/period), class M (0-2/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 11-90

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


Geomagnetic activity forecast for the period July 14 - July 20, 2017


Quiet: Jul 18 - 20
Unsettled: Jul 16 - 17
Active:    Jul 14 - 15
Minor storm: possible  but unlikely Jul 14 - 15
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Starting the new priod, we expect active episode the coming days (July 14
- 16). The next days, we expect at most unsettled conditions till July 18.
The rest of forecasted period, we expect geomagnetic activity decrease to
quiet level.

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


Geomagnetic activity forecast for the period July 14 - August 10, 2017


Geomagnetic field will be: 
quiet on July 17, 25 -26, August 1 - 2 
mostly quiet on July 16, 24, 27, 30 - 31, August 4, 8 
quiet to unsettled July 15, 18 - 20, 23, August 3 
quiet to active on July (13 -) 14, 21 - 22, 28 - 29, August 7 
active to disturbed on August 5 - 6 
 
Amplifications of the solar wind from coronal holes are expected 
on July 13 - 16 (-17), 20 - 21, (23 - 24, 28 - 29,) August 6 - 8
 
Remark:
- Parenthesis means lower probability of activity enhancement 
and/or lower reliability of prediction. 

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