A rectangular loop source of current on multilayered earth

Abstract

The idea of using electromagnetic (EM) fields to delineate layered‐earth structure is not new. In fact, the theory of EM depth sounding is very well developed mainly because all EM problems in stratified media in which stratification is horizontal are amenable to elegant mathematical solutions. A recent book on EM sounding by Patra and Mallick (1980) lists important earlier publications on the subject. With the addition of Wait (1962) and Ward (1967), this is a fairly comprehensive list and is recommended for interested readers.