Solar activity forecast for the period July 28 - August 3, 2017


Activity level: mostly very low
X-ray background flux (1.0-8.0 A): in the range A4.0-B1.0
Radio flux (10.7 cm): a fluctuation in the range 67-80 f.u.
Events: class C (0-3/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-50

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 27 - August 3, 2017


Quiet: Jul  27 - 28, Aug 1 - 2
Unsettled: Jul 29 - 3, Aug 3
Active:    possible Jul 29 - 30
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Next week, we do not expect anz storming event. Within the quiet to
unsettled course,  a single active episode is possible July 29 - 30, 
possible but unlikely also August 3.  During the coming weekend, we expect
more unsettled conditions, till Saturday, July 29, and since August 1, at
most quiet conditions are probable.

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



Geomagnetic activity forecast for the period July 28 - August 22, 2017


Geomagnetic field will be: 
quiet on August 4, 9 
mostly quiet on July 30, August 2, 8, 10, 14 - 15 
quiet to unsettled July 28 - 29, August 1, 3, 16 
quiet to active on July 31, August 5, 7, 11, 13, 17 - 22 
active to disturbed on August 6, 12 
 
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 due irregular changes
in position and area of coronal holes. 

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