Solar activity forecast for the period November 17 - November 23, 2017


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A4.0-A8.5
Radio flux (10.7 cm): a fluctuation in the range 68-80 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 0-45

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


Geomagnetic activity forecast for the period November 17 - November 23, 2017


Quiet: Nov 19
Unsettled: Nov 17 - 18, 20 - 22
Active:    Nov 21 - 23
Minor storm:  possible but unlikely Nov 21
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
At our latitudes, we expect active conditoins between November 20 - 21,
about November 18, an isolated active event is possible. During these
days, minor storming effect is possible but unlike. Till Monday, November
20, we expect at most unsettled conditions with short decrease to quiet
level about November 19.
The second half, we expect active episode arrival but the local K-index
should not exceed K=4.

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



Geomagnetic activity forecast for the period November 17 - December 13, 2017


Geomagnetic field will be:
quiet on November 24 - 28, December 2, 9 
mostly quiet on November 19, 23, 29, December 8 
quiet to unsettled on November 18, December 1, 3, 11 - 12 
quiet to active on November 17, 30, December 4, 7, 12 - 13 
active to disturbed on November 20 - 22, December 5 - 6 

Amplifications of the solar wind from coronal holes are expected
on November (17 - 19,), 20 - 24, (29 - 30,) 
and on December (1 - 5,) 5 - 7, 9 - 12 

Remarks:
- Parenthesis means lower probability of activity enhancement.
- Current forecasts still remains less reliable ...

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