Transient diffusive electromagnetic fields in layered anisotropic media

The structural problem of the diffusion of transient electromagnetic fields in a stratified arbitrarily anisotropic conducting earth is investigated. In order to solve the equations governing the behavior of diffusive electromagnetic fields, an analytical method is developed based on the modified Cagniard method. Numerical results are presented. It is noted that one of the main advantages of using the modified Cagniard method is that it yields exact expressions in which arbitrary anisotropy is accounted for in the same way as isotropy, the only difference being that in the latter case simple and well known results can be obtained explicitly.<>