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Weekly Forecasts Bulletin

Solar activity forecast for the period June 3 – June 9, 2016

Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A8.5-B2.5
Radio flux (10.7 cm): a fluctuation in the range 75-100 f.u.
Events: class C (0-3/day), class M (0-2/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 10-70

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

Geomagnetic activity forecast for the period June 3 – June 9, 2016

Quiet: Jun 3 and 7 – 9
Unsettled: Jun 3 and 6
Active:  Jun 4 – 5
Minor storm: probable Jun 4 – 5
Major storm:0
Severe storm: 0

Geomagnetic activity summary:
Because of current coronal hole passage, we expect active conditions
arrival June 4-5, minor storm events are also probable at our latitudes.
At Jun 6, we expect unsettled conditions continuing. The following days,
we expect return to quiet to unsettled conditions.

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

Geomagnetic activity forecast for the period June 3 – June 29, 2016

Geomagnetic field will be:
quiet on June 9, 20, 22
mostly quiet on June 8, 15 – 17, 21, 23, 29
quiet to unsettled on June 7, 10, 13 – 14, 28
quiet to active on Jun 3 – 4, 5 – 6, 11 – 12, 19, 24 – 25, 26 – 27
active to disturbed on June 18

Amplifications of the solar wind from coronal holes are expected
on June (6 -)7 – 8, (14 -)16 – 17, (26, 30)

Remarks:
– Parenthesis means lower probability of activity enhancement.
– Reliability of predictions is slightly reduced.

F. K. Janda, OK1HH
Czech Propagation Interested Group
(OK1HH & OK1MGW, weekly forecasts since 1978)
e-mail: ok1hh(at)rsys.cz

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