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Priority to JP2528582ApriorityCriticalpatent/JPS58142268A/ja
Publication of JPS58142268ApublicationCriticalpatent/JPS58142268A/ja
Publication of JPH0340352B2publicationCriticalpatent/JPH0340352B2/ja
G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices