[A-DX] Funkprognose 17.-23. September

[Wolf Harranth <harranth@xxxxxxxx>]

Solar-activity forecast for the period Sep 17 - 23, 2004

Activity level: predominantly very low to low
Radio flux (10.7 cm): a fluctuation in the range 80-130 f.u.
Flares: weak (1-12/day), middle (0-1/period)
Relative sunspot number: in the range 30-90

Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch@xxxxxxxxxx
(RWC Prague)
_________________________________________________________________

Geomagnetic activity forecast for the period Sep 17 to Sep 23, 2004

quiet: Sep 20 to 23
quiet to unsettled: Sep 19
unsettled: Sep 18
active: Sep 17
minor storm: 0
major storm: 0
severe storm: 0

Geomagnetic activity summary: geomagnetic field was quiet from
Sep 9 to 13, unsettled on Sep 15, active on Sep 14.

RWC Prague, Geophysical Institute Prague, Geomagnetic Dept,
Czech Republic
e-mail: geom@xxxxxxxxx
_________________________________________________________________

Geomagnetic activity forecast for the period of one solar rotation

active:    Sep 17-18, 21, (23-)24, 26-27, Oct 3-6, 11
disturbed: Sep 17-18, (24,) 26(-27), Oct (3-4, 6), 11
quiet:     Sep (19-)20, (22,) 28-30, Oct 1(-2), (7,) 8-9, (10)

Survey:   quiet to unsettled: Sep 9-12
          quiet to active: Sep 8
          active: Sep 15
          quiet to disturbed: Sep 13
          disturbed: Sep 14

Remarks: Days in brackets () => lower probability of activity
         (or lower accuracy of) forecast, depending on previous
         development on the Sun. In addition at this time of
         the solar cycle, space weather conditions are frequently
         determined by short timescale events, usually not able
         to be forecasted.

Frantisek K. Janda, OK1HH, Czech Propagation Interested Group
e-mail: franta.janda@xxxxxxxx


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