Solar-activity forecast for the period Apr 16 - 22, 2010

Activity level: mostly very low
Radio flux (10.7 cm): a fluctuation in the range 74-80 f.u.
Flares: weak (0-6/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 16 to Apr 22, 2010

quiet: Apr 16, 20 and 21
quiet to unsettled: Apr 17, 19 and 22
unsettled: Apr 18
active: 0
minor storm: 0
major storm: 0
severe storm: 0

Geomagnetic activity summary: geomagnetic field was quiet on
Apr 9, 10 and 13, unsettled on Apr 8, 11, 12 and 14.

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: May 2 - 3,
unsettled to active: Apr (17), 28 - 30, May 1, 4 - 5, 11 - 12
quiet to unsettled: Apr (18) 21 - 22, 27, May 6 - 7, (8 - 9)
quiet: Apr (16), 19 - 20, 23 - 25, (26), May 10

Survey: quiet: Apr 10
       mostly quiet: Apr 13
       quiet to unsettled: Apr 9
       quiet to active: Apr 8
       quiet to minor storm: -
       mostly unsettled: -
       unsettled to active: Apr 11 - 12
       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