http://en.wikipedia.org/wiki/Auroral_kilometric_radiation
interesting possibility -----Original Message----- From: mix...@bigpond.com >The signal has a frequency of .43 MHz (430 kHz). This seems to be a >signature - and a strong one. But it is too early to generalize. This could be a cyclotron frequency of electrons in the Van Allen belts. Maybe the Earth's magnetic field is acting as the magnetic field in a transformer, with the electrons in the Van Allen belts as the primary, and the experimental setup as the secondary? Or is my imagination running away with me? :) Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html