Magnetic prospecting is a geophysical method based on the examination of magnetic field anomalies of the Earth caused by non-similar magnetization intensity of rocks. It is one of the methods of prospecting geophysics.

Physical and geological prerequisites of this method implementation are based on magnetic dissimilarities of rocks, which form geological structures in the Earth crust. The magnetic field of the Earth magnetizes rocks to a variable degree which is determined by their magnetic susceptibility, intensity and magnetizing force.

Sedimentary rocks, being gas and oil repositories, are most commonly non-magnetic.