Abstract
The expressions for the energy radiated per second from an oscillating vertical magnetic dipole situated above a two‐layer earth are derived. Of the three important cases to which particular attention has been given, the first and the second involve the presence of a conducting and insulating substratum, respectively. The third deals with a dipole placed over a thin conducting sheet of infinite extent. Appropriate approximations have been made such that the results may be useful for geoelectrical exploration.

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