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


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A5.0-B1.0
Radio flux (10.7 cm): a fluctuation in the range 65-90 f.u.
Events: class C (0-4/day), class M (0/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 February 17 - February 23, 2017


Quiet: Feb 19 - 21
Unsettled: Feb 17 - 18, 22 -23
Active: Feb 17, 23
Minor storm:  0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
We expect quiet to unsettled conditions for the most of the forecasted
period. Active episode is possible tomorrow, e.g. February 17, and also
February 23. These days are the most probable for the unsettled course,
zhe other ones, e.g. February 19 - 21, are expected as at most quiet.

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


Geomagnetic activity forecast for the period February 17 - March 15, 2017


Geomagnetic field will be:
quiet on February 21, 24, 26, March 8, 11 - 12 
mostly quiet on February 19 - 20, March 9 - 10 
quiet to unsettled February 17, March 4, 7, 13 - 15 
quiet to active on February 18, 25, March 3, 6 
active to disturbed on February (22 - 23,) 27 - 28, March 1 - 2, 5 

Amplifications of the solar wind from coronal holes are expected
on February 16 - 17, (18 - 22, 26 - 27,) March 2 - 5

Remark:
- Parenthesis means lower probability of activity enhancement.

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