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Weekly Forecasts Bulletin

Solar activity forecast for the period July 29 – August 4, 2016

Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A4.0-B2.0
Radio flux (10.7 cm): a fluctuation in the range 60-95 f.u.
Events: class C (0-2/day), class M (0-1/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-40

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

Geomagnetic activity forecast for the period July 29 – August 4, 2016

Quiet: Aug 01 – 02
Unsettled: Jul 29 – 31, Aug 3 – 4
Active:  Jul 29 and Aug 4
Minor storm: possible Jul 29 and Aug 4
Major storm:0
Severe storm: 0

Geomagnetic activity summary:
Local geomagnetic field was quiet till Jul 27. Currently, unsettled
conditions are actual and an active episode is possible for Friday, Jul
29.
We expect unsettled condiions during the coming weekend (Jul 30 – 31),
then, Aug 1 and 2, quiet episode is expectable. At the end of forecasted
week, active episode is possible at Aug 4.

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

Geomagnetic activity forecast for the period July 22 – August 24, 2016

Geomagnetic activity forecast for the period July 29 – August 24, 2016

Geomagnetic field will be:
quiet on August  23 – 24
mostly quiet on August 1 – 2, 12 – 14, 17 – 18, 22
quiet to unsettled on July 31, August 5 – 7, 10 – 11, 19
quiet to active on July 29 – 30, August 3 – 4, 8 – 9, 15 – 16, 20 – 21
active to disturbed on August (3 – 4)

Amplifications of the solar wind from coronal holes are expected:
on July 29 – 30, August 2 – 4, 7 – 9, 20 – 21

Remarks:
– Parenthesis means lower probability of activity enhancement.

Petr Kolman, OK1MGW
Czech Propagation Interested Group
(OK1HH & OK1MGW, weekly forecasts since 1978)
e-mail: kolmanp(at)razdva.cz

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