Aeromagnetic survey in Minnesota



The Minnesota Geological Survey is acquiring over 75,000 line km of aeromagnetic data over east central Minnesota as a continuation of a long-range program to map the entire state. The survey is being flown at a mean ground clearance of 150 m with a 400-m line spacing. The survey area is bounded to the north and south by 47°37′30″ and 45°37′30″ and to the east and west by 93° and 94°37′30″. This area adjoins a 100,000 line km aeromagnetic survey over northeastern Minnesota that was acquired and released by the Minnesota Geological Survey in 1979–1980.