Electromagnetic data and in particular magnetotellurics provide another view of the crust and upper mantle. The electrical resistivity structure provides images of the lithosphere which have been very successful in different geological contexts: From the shallow to the deeper lithosphere, including tectonic studies, exploration for hydrocarbons, minerals and ground water, among others. This session is intended to discuss new data sets in each of these contexts, for which the electromagnetic community is invited to participate.