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Weekly Forecasts Bulletin

Solar activity forecast for the period August 12 – August 18, 2016

Activity level: mostly very low to moderate
X-ray background flux (1.0-8.0 A): in the range A7.0-B4.0
Radio flux (10.7 cm): a fluctuation in the range 80-110 f.u.
Events: class C (0-5/day), class M (0-3/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 10-90

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

Geomagnetic activity forecast for the period August 12 – August 18, 2016

Quiet: Aug 13 – 14
Unsettled: Aug 12, Aug 15 – 18
Active:  possible Aug 15 – 16
Minor storm: 0
Major storm:0
Severe storm: 0

Geomagnetic activity summary:
After the last unsettled episode, we expect for Budkov observatory quiet
to unsettled conditions till Aug 15. This and following day, an active
episode is possible. Then, we expect return of quiet to unsettled
conditions to the last two days.

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

Geomagnetic activity forecast for the period August 12 – September 7, 2016

Geomagnetic field will be:
quiet on August 26 – 27
mostly quiet on August 12 – 14, 17 – 18, 22, September 7
quiet to unsettled on August 15, 19, 23, 31, September 1 – 3, 6
quiet to active on August 16, 20 – 21, 24 – 25, 28 – 30, September 4 – 5
active to disturbed on August (29 – 30)

Amplifications of the solar wind from coronal holes are expected:
on August 20 – 21, 23 – 24, 28 – 30, September 4 – 5

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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