Includes documents concerning activity specific to BRGM, as well as released data and documents from other companies: A. Categories of documents: detailed memoranda of measurements on paper and magnetic support; diagrams, profiles, plans and maps; reports. B. Main topics: geophysics methods applied to: basic geological knowledge; mining exploration; hydrogeology; civil engineering; environment. Methods applied in the following areas: airborne (magnetism, electromagnetism, scintillometry); on the ground (magnetism, gravimetry, electric, seismic, etc.); in drilling (diagraphics [well-logging]); in water. (It should be noted that the SNEA(P) Collection of archives of mining geophysics was released to BRGM following the cessation of mining activities by that company.)