“…MT has been successfully applied in numerous tectonic studies (recently reviewed by Unsworth [], Weckmann [], and Selway []), and here only a very brief general overview about basic MT principles is given; for more detailed discussion of theoretical aspects of the MT methods, the interested reader is referred to standard literature [e.g., Schmucker , ; Vozoff , ; Berdichevsky , ; Simpson and Bahr , ; Becken et al , ; Berdichevsky et al , ] and the new book by Chave and Jones [], as well as the review papers from the biennial IAGA EM Induction Workshops. In MT, the depth of investigation is directly dependent on the period of the utilized electromagnetic waves and the resistivity of the subsurface, so penetration to all depths is assured, albeit with broader and broader resolution kernels.…”