mercoledì 5 Agosto 2020
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Weekly Forecasts Bulletin

 Solar activity forecast for the period August 7 – 13, 2015

Activity level: mostly low to moderate
X-ray background flux (1.0-8.0 A): in the range B1.5-B9.0
Radio flux (10.7 cm): a fluctuation in the range 100-140 f.u.
Events: class C (0-12/day), class M (0-4/day), class X (0-1/period),
proton (0/period)
Relative sunspot number (Ri): in the range 20-100

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

Geomagnetic activity forecast for the period August 6 – 12, 2015

quiet: Aug 10, 11 and 12
quiet to unsettled: Aug 6
unsettled: Aug 7 and 8
active: Aug 9

Geomagnetic activity summary: geomagnetic field was guiet
on Aug 3 and 4, quiet to unsettled on Aug 1 and 2, unsettled
on Jul 30 and 31.

RWC Prague, Geophysical Institute Prague, Geomagnetic Dept,
Czech Republic
_________________________________________________________________________

Geomagnetic activity forecast for the period August 7 – September 2, 2015

Geomagnetic field will be:
quiet on August 14 – 15
mostly quiet on August 12 – 13, 23, 31, September 1
quiet to unsettled on August 10 – 11, 16 – 17, 19 – 22, 24, 29 – 30
quiet to active on  August 9, 18, 25 – 26, 28 September 2
active to disturbed on August 7(-8), 27

Amplifications of the solar wind are expected on August 7 – 9, 25 – 28

Remarks:
– Reliability of predictions remains reduced in present solar cycle phase.
– 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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