New 3D Electrical Map Sheds Light on Britain’s Deep Structure A milestone in terrestrial geophysics arrives with Montiel-Álvarez and colleagues’ first 3D electrical resistivity model of Britain. Built from long-period magnetotelluric (MT) data collected across the island, the model—named BERM-2024—provides a high-resolution view of how electrically conductive and resistive rocks are arranged beneath Britain’s surface.…