I’ve always been a fan of the television series called “Nova” on PBS (Public Broadcasting Service) and I found a great video clip discussing magnetic storms and its effect on our planet. It is with unequivocal certainty that any significant magnetic changes on our planet will greatly affect radio propagation and no one knows to which extent. If you love science and the universe the way I do, sit back and enjoy this excellent documentary.
Wikipedia defines a Magnetic Storm as: << … a temporary disturbance of the Earth’s magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field which interacts with the Earth’s magnetic field. The increase in the solar wind pressure initially compresses the magnetosphere and the solar wind’s magnetic field interacts with the Earth’s magnetic field and transfers an increased energy into the magnetosphere. Both interactions cause an increase in movement of plasma through the magnetosphere (driven by increased electric fields inside the magnetosphere) and an increase in electric current in the magnetosphere and ionosphere.>>
To read more, click -> http://en.wikipedia.org/wiki/Geomagnetic_storm
And finally, here is a neat video about the origins of Earth’s magnetic field.