Effect of inclined conductivity anisotropy on frequency induction and TEM data

The harmonic electromagnetic field of a vertical magnetic dipole above an anisotropic half-space has been simulated using a forward algorithm for layered conductive media with inclined anisotropy. Inclined anisotropy has been found out to change the typical behavior of frequency and transient responses. Qualitative interpretation of FD loop–loop responses of a conducting earth with inclined anisotropy requires taking into account the receiver azimuth dependence of apparent resistivities. In the case of time-domain measurements, this dependence is absent but the apparent resistivities are higher at late times.