Solar-activity forecast for the period Apr 23 - 29, 2010

Activity level: mostly very low
Radio flux (10.7 cm): a fluctuation in the range 75-81 f.u.
Flares: weak (0-5/day)
Relative sunspot number: in the range 0-25

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

Geomagnetic activity forecast for the period Apr 23 to Apr 29, 2010

quiet: Apr 24, 25, 26, 28 and 29
quiet to unsettled: Apr 23 and 27
unsettled: 0
active: 0
minor storm: 0
major storm: 0
severe storm: 0

Geomagnetic activity summary: geomagnetic field was quiet from
Apr 15 to 21.

RWC Prague, Geophysical Institute Prague, Geomagnetic Dept,
Czech Republic
e-mail: geom(at)ig.cas.cz

Geomagnetic activity forecast for the period of one solar rotation

Geomagnetic field during the following solar rotation should be:

active to disturbed: -
unsettled to active: Apr 26 - 28, May (1 - 4)
quiet to unsettled: Apr 29 - 30, May 5 - 7, (8 - 9), 11 - 12, 17 - 19
quiet: Apr 23 - 25, May 10, 13 - 16

Survey: quiet: -
       mostly quiet: 16 - 21
       quiet to unsettled: -
       quiet to active: Apr 14 - 15
       quiet to minor storm: -
       mostly unsettled: -
       unsettled to active: -
       minor to major storm: -
       active to disturbed: -
       disturbed: -

  Notices:
       Days in brackets refer to a lower probability of possible
       activity enhancements depending on previous development on the sun.
       Accuracy and reliability of forecasts are generally low at present.

Petr Kolman, OK1MGW, Czech Propagation Interested Group
e-mail: kolmanp(at)razdva.cz