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Solar activity forecast for the period December 8 – December 14, 2017

Solar activity forecast for the period December 8 – December 14, 2017

Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A3.0-A8.0
Radio flux (10.7 cm): a fluctuation in the range 66-75 f.u.
Events: class C (0-2/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-35

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

Geomagnetic activity forecast for the period December 8 – December 14, 2017

Quiet: Dec 9 – 10
Unsettled: Dec 8, 11 – 14
Active:  possible  Dec 12 – 13
Minor storm:  0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
After the last storming event (December 5, at the Budkov observatory, the
local K-index reached value = 5), current geomagnetic activity has
decreasing course to quiet to unsettled level. We expect at most quiet
conditions December 9 – 10, then, we expect unsettled conditons return.
Nevertheless, at most of forecasted period, we expect the geomagnetic
activity between quiet and unsettled level. At the end of forecasted week,
an isolated active event is possible. Nevertheless, the end of forecasted
period should stay at unsettled level.

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

Geomagnetic activity forecast for the period December 8 – January 3, 2017

Geomagnetic field will be:
quiet on December 9, 17, 23 – 24
mostly quiet on December 8, 10, 14 – 16, 22, 25, 30
quiet to unsettled on December 11, 26, 28
quiet to active on December 12, 20 – 21, 27, 29, 31, January 2 – 3
active to disturbed on December 13, 18 – 19, January 1

Amplifications of the solar wind from coronal holes are expected
on December  8 (- 11), 17 – 22, (24 – 25), 30 – 31

Remark:
– Parenthesis means lower probability of activity enhancement.

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

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