[NZ4O Spaceweather] Discussion Of Solar Space & Geomagnetic Weather Conditions

[Thomas F Giella NZ4O]

Published on Wednesday October 10, 2012 at 1430 UTC. Valid for the next 24 
hours.


1.) DISCUSSION OF SOLAR, SPACE & GEOMAGNETIC WEATHER CONDITIONS THAT CAN 
IMPACT MF & HF RADIO WAVE PROPAGATION IN A NEGATIVE MANNER-

For the 12th day in the row the daily sunspot number has languished below 
100, currently at 63.

There are no significant impediments to good radio wave propagation on the 
HF bands as far as solar, space and geomagnetic weather. However the daily 
sunspot number needs to be higher than the present 63, as the higher the 
sunspot number (150 & >) the more ultraviolet light available to increase 
ionization in the F/F2 layer, for more consistent east-west radio wave 
propagation openings on 12 and 10 meters.

On the medium frequency (MF) bands there is the normal absorption of RF 
signals in the D layer due to incoming cosmic rays and hard x-rays. Also the 
background x-ray flux is running in the C range so there is some additional 
minor absorption of RF signals in the D layer.



73 & GUD DX, 
Thomas F. Giella, NZ4O
Lakeland, FL, USA
nz4o at tampabay.rr.com

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