This session covers all methods and scales used for registering, processing and interpretation of magnetic field data, from the core to the crustal anomalies and corresponding deep or shallow sources: from satellite missions to oceanic profiles and detailed ground based arrays, and from mathematical processing to petrophysical and geological ground evidence. Presentations on compilation and interpretation methods of heterogenous data sets, useful definitions of magnetic field changes, for scientific Earth's interior studies or natural resources exploration purposes, as well as studies of eventual temporal anomaly changes are also encouraged. New theories of magnetic data modelling and applications in exploration and geological interpretation of magnetic anomalies, jointly with other geodata are warmly welcome.