INDUCED POLARIZATION: This method is based on energizing the soil with an alternating current through the AB current electrodes for a certain time T, then measuring the equilibrium potential between the MN electrodes. This potential, produced as a result of the polarization of the ground, decays according to an asymptotic course. The moment you stop energizing, the potential between MN does not fall instantaneously to zero, but decays in a certain time. The time required to restore equilibrium is a function of the degree of polarizability of the soil. The presence of minerals in the soil - such as scattered sulfites - generates induced polarization; in addition to mining applications, induced polarization is also used for environmental monitoring applications (e.g. leachate diffusion phenomena in landfills).