venerdì 27 novembre 2015

Solar activity forecast for the period November 27 - December 3, 2015

Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A9.5-B8.5
Radio flux (10.7 cm): a fluctuation in the range 85-125 f.u.
Events: class C (0-10/day), class M (0-3/period), class X (0/period),
        proton (0/period)
Relative sunspot number (Ri): in the range 10-85

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 November 27 - December 3, 2015

Geomagnetic field is currently quiet, local K-index was at he Budkov
observatory at the lowest value (K=0 last two days).
First half of forecasted week, we expect quiet to unsettled conditions.
The second one, the activity should be at range of quiet and unsettled
level only with one active episode. The active episode is expectable at
Dec 1-2 and should be caused by positively charged coronal hole stream.
But for the Budkov observatory, we expect K=4 at the start of december.
Last day, return to quiet to unsettled conditions is probable.

Tomas Bayer
Institute of Geophysics ASCR
Budkov Geomagnetic Observatory (BDV)
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Geomagnetic activity forecast for the period November 27 - December 22, 2015

Geomagnetic field will be:
quiet on November 27 - 28, December 17 - 22
mostly quiet on December 13, 16
quiet to unsettled on November 29, December 9, 11 - 12
quiet to active on December 2 - 5, 7 - 8, 10, 14 - 15
active to disturbed on November 30, December 1, 6

Amplifications of the solar wind are expected on November 29 - 30,
December 1 - 8, 10 - 11, 14 - 15


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