Solar activity forecast for the period April 7 - April 13, 2017


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A5.5-B3.0
Radio flux (10.7 cm): a fluctuation in the range 60-95 f.u.
Events: class C (0-4/day), class M (0-2/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-75

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


Geomagnetic activity forecast for the period April 7 - April 13, 2017


Quiet: Apr 9 - 13
Unsettled: Apr 7 - 8, 12 - 13
Active:  unlikely Apr 7
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Next week, we expect generally quiet to unsettled conditions. An unlike
isolated active episode can occur during the coming three days but we
expect also quiet to unsettled level. Between April 9 and 12, we expect
the quietest course, the last days of forecasted period, an unsettled
episode is possible.

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


Geomagnetic activity forecast for the period April 7 - May 2, 2017


Geomagnetic field will be:
quiet on April 9 - 10, 14 - 16, 20, 30 
mostly quiet on April 8, 11, 19, 21, 29, May 2 
quiet to unsettled April 12 - 13, May 1 
quiet to active on April 7, 22, 24 - 28 
active to disturbed on April 17 - 18, 23 

Amplifications of the solar wind from coronal holes are expected
on April (7 - 8,) 11 - 13. (15,) 16 - 19, 24 - 27 

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 1978
e-mail: ok1hh(at)rsys.cz