The Geological Survey of Western Australia (GSWA) produces data, information and knowledge to stimulate the mineral and energy resources industry and to inform government, the scientific community and the public on all matters related to Solid Earth science in Western Australia. With input including industry reports, geological mapping, drillcore logging, geophysical, geochemical and geochronological data acquisition (internal and external) and integrated imaging, analysis, modelling and interpretation, GSWA produces maps, explanatory notes, publications, datasets and digital information packages. The desired outcome is an improved knowledge base, both internal to GSWA and for our stakeholders, of understanding Earth’s crust and lithosphere and its evolution across Western Australia. Understanding Earth’s complexity and becoming predictive, no matter if Earth’s crust, mantle, or regolith cover are concerned, requires a step change from fundamental geoscience activities of mapping, analysing and documenting rocks, minerals, structures and landscapes. Geophysical data acquisition, processing and interpretation are fundamental to this undertaking. Although the completion of statewide coverage in geophysical data are a priority for acquisition, transects using active and passive source seismic methods and magnetotellurics have proven to be indispensable, particularly when interpreted together with geochemical, geological and isotopic data on a large scale. Examples are the Yilgarn and the Pilbara Cratons and their margins.