Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Modified Mercalli Intensity contours for the earthquakes from December 16, 1811 at 815 GMT through June 10, 1987 at 2348 GMT

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/isoseis.faq.html
Description Isoseismals of historic Central U.S. earthquakes are contained in 26 separate coverages. Margaret Hopper provided these isoseismals after reexamining the intensity data and re-calculating the isoseismal contours. She generated isoseismal contours for eac
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

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