LF: LF propagation and Kp index

["Toni" <hb9asb@freesurf.ch>]

> From HB2ASB
At different occasions I've made the following observations: It seems to
me that there is a link between distortions in the magnetic field of the
earth (caused by solar activity) and LF propagation. After a magnetic
storm (not during) daylight propagation is often enhanced and night
propagation disturbed and below average. 
I've also found a description of this phenomenon in old literature about
LF propagation. At

http://sec.noaa.gov/rt_plots/kp_3d.cgi

you may observe the development of the Kp Index.

73 de Toni