Answers are grounded in this paper and cite their sources.
The response of an oscillating magnetic dipole over a continuously stratified flat earth is considered. As a result of certain simplifying approximations, which are valid at low audio frequencies, solutions for exponentially varying conductivities can be obtained in relatively simple form.
No takes yet. Share an insight, caveat, or question.
James R. Wait (1962) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: