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

[Thomas F Giella NZ4O]

Published on Thursday October 04, 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 6th day in the row the daily sunspot number has languished below 
100.

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 58. The higher the 
sunspot number (100 & >) (150 & > best) 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) band there exists the normal absorption of RF 
signals through the D layer due to incoming cosmic rays and hard x-rays. 
Also the background x-ray flux is running in the B range so there is some 
absorption of RF signals through the D layer.



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

NZ4O Amateur Radio & SWL Autobiography: http://www.nz4o.com
NZ4O MF/HF/6M Radiowave Propagation Forecast: http://www.solarcycle24.org