Abstract: The present invention involves service induction techniques to produce two-dimensional spatially continuous imaging of subsurface conditions for interpreting and verifying three-dimensional, spatially continuous imaging of subsurface conditions or for planning a survey using three-dimensional, spatially continuous imaging. A transmitter coil is placed in the surface of the earth with the axis of the core perpendicular to the surface of the earth. A surface probe including a horizontal coil and a vertical coil is located along the surface of the earth at a fixed offset from the transmitter. Application of an alternating current to a transmitter coil generates a primary magnetic field adjacent to the transmitter.

Abstract: Methods and apparatus for measuring pollutants contaminating earth formation. Specifically, the invention involves the three dimensional, spatially continuous imaging of sub surface conditions using electromagnetic induction techniques. The technique utilizes the resistivity of near surface volumes of earth formation in order to determine and graphically represent the magnitude and migration of pollutants. Included in the invention are the logging techniques and apparatus as well as the method of converting the captured data into a pseudo resistivity log suitable for a three dimensional imaging of sub surface conditions.