Marine magnetic gradiometer: A tool for the seismic interpreter

The marine magnetometer has been used since the early '50s as an ancillary tool on vessels conducting regional and local seismic surveys. Emphasis on marine magnetic data by academia has led to major discoveries about the structure of the earth's crust, such as the association of shallow, crustal magnetic anomalies to seafloor spreading and long-wavelength anomalies to deep crustal origin. The same enthusiasm has not occurred in industry primarily because greater emphasis has been placed on multichannel seismic reflection data.