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
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

Related topics

States or counties


values for modified mercali intensity contours

Label Definition
INTENSITY average of intensity values from felt reports