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


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A3.0-A9.5
Radio flux (10.7 cm): a fluctuation in the range 55-85 f.u.
Events: class C (0-1/day), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-50

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


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


Quiet: Mar 16 - 17, 20 - 22
Unsettled: Mar 18 - 19, 22 - 23
Active:  Mar 18 - 19, 23
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:

we expect two unsettled subperiods which may reach to active level. The
first one is probable March 18 - 19, the other one is probable to the
end of forecasted period, e.g. about March 23. Between to these events,
we expect at most quiet to unsettled conditions till the effect of
equatorial coronal hole located yet at the perifery of solar disk.

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


Geomagnetic activity forecast for the period March 17 - April 12, 2017


Geomagnetic field will be:
quiet on March 26, April 6 - 7, 9 - 10
mostly quiet on March 21, April 5, 11
quiet to unsettled March 22, (27,) April 1 - 2, 4 
quiet to active on March 17 - 20, (23 - 25,) 28, 31, April (8, 12)
active to disturbed on March 29 - 30, (April 3) 

Amplifications of the solar wind from coronal holes are expected
on March (18 - 22,) 23 - 27, April (3 - 8,) 14-?

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