On the Theory of Transient Electromagnetic Sounding over a Stratified Earth

Abstract

Electromagnetic transient coupling between two small ungrounded loops is considered for the case where the earth is a two-layer conducting half-space. The formal solution for the impulse response is approximated with special attention to the initial stages of the time function. Various limiting cases are also considered. It is shown that the most convenient scheme for interpretation is when the two loops are raised above the earth's surface.