Solar activity forecast for the period September 4 - 10, 2015

Solar activity forecast for the period September 4 - 10, 2015

Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A9.0-B6.0
Radio flux (10.7 cm): a fluctuation in the range 80-115 f.u.
Events: class C (0-12/day), class M (0-4/period), class X (0/period),
        proton (0/period)
Relative sunspot number (Ri): in the range 5-75

Jozef Lesko
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz
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Geomagnetic activity forecast for the period September 4 - 10, 2015

AT the September 4 and 5, we expect quiet to unsettled conditions. Next
days, Sep 6 - 7, unsettled conditions with active episode are possible.
Sep 8 - 9, quiet to unsettled conditions are probable. The last day but
more probable at the new weekly forecast, we can expect active conditions
again.

Tomas Bayer
Institute of Geophysics ASCR
Budkov Geomagnetic Observatory (BDV)
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Geomagnetic activity forecast for the period September 4 - 30, 2015

Geomagnetic field will be:
quiet on September 9 - 10, 26 - 28
mostly quiet on September 6 - 8, 20 - 21, 29
quiet to unsettled on September 4 - 5, 10, 14, 17 - 18, 25, 30
quiet to active on September 11 - 13, 15 - 16, 22
active to disturbed on September (11), (15),19, 23 - 24

Amplifications of the solar wind are expected on September 10 - 13,
15 - 16, 19, 22 - 24


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