The induction geophysicist must account for the length-scale dependence of electrical conductivity when interpreting electromagnetic data and constructing geoelectrical models. The Induction Geophysicist. Research in electromagnetic induction contains a rich mixture of physics, geology, hydrology, applied mathematics, engineering, and computational science. The theoretical problems involve areas as diverse as mantle convection, transport in heterogeneous media, structural geology, nonlinear optimization, and large-scale finite element analysis. Practical issues concern problems in building fast electronics and arrays for high resolution near-surface images, and the design of experiments that better illuminate the intimate relationship between electrical conductivity and fluid permeability.
Seismology is the traditional workhorse for imaging the interior of the earth.
Electromagnetic induction offers a valuable, second perspective. The Earth responds to applied voltages like a complicated LCR electrical network. We analyze the response in terms of the interior physiochemical structure. Electrical conductivity mapping of the upper mantle .