
%0 Journal Article
%A Petersons, H.F. 
%T Electromagnetic induction in the Earth using long period geomagnetic variations
%J Exploration Geophysics
%D 1993/06/01
%V 24
%N 2
%P 157-160
%K 
%R https://doi.org/10.1071/EG993157
%U https://www.publish.csiro.au/paper/EG993157 
%X Early studies of the Earth's electrical conductivity assumed, for mathematical simplicity, a spherically symmetric conductivity model. In more recent times, a number of studies have questioned this assumption. In particular, two studies of the long-period geomagnetic variation response of the Earth indicate departure from spherical symmetry. 
