Fig. 2From: On the modelling of M2 tidal magnetic signatures: effects of physical approximations and numerical resolutionElectrical conductivity. Top left: The 1-D electrical conductivity profile of the Earth’s mantle after Grayver et al. (2017). Top right: Map of the electrical surface conductance of the oceans and continents used in the 2-D models. Bottom: Electrical conductivity map including the effects of seawater salinity, temperature, and the presence of sediments. Cross sections at 1.275 km depth (left) and at the surface (right)Back to article page