Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Gravity and aeromagnetic surveying and modeling lines

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Description Lines in this cover show where gravity oe aeromagnetic data have been modelled to constrain subsurface structure. Gravity and magnetic signatures result from deep structure, such as might be at hypocentral depths of earthquakes. We show only the lines for
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

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name and reference of gravity and magnetic profiles

Label Definition
NAME name of gravity or magnetic profile, G, M, or GM for gravity, mag, or both
REF abbreviated reference for source or interpretation of profile