File:New Madrid and Wabash seizmic zones-USGS.png

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English: This map of the New Madrid and Wabash Valley seismic zones shows earthquakes as circles. Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis). Green circles denote earthquakes that occurred prior to 1974 (USGS Professional Paper 1527). Larger earthquakes are represented by larger circles.
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Source USGS at http://pubs.usgs.gov/fs/2006/3125/pdf/FS06-3125_508.pdf
Author USGS/Joan Gomberg and Eugene Schweig
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Other versions Derivative works of this file:  New Madrid and Wabash seizmic zones-USGS mod.png

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current02:30, 25 April 2008Thumbnail for version as of 02:30, 25 April 2008748 × 819 (467 KB)Kbh3rd (talk | contribs){{Information |Description=This map of the New Madrid and Wabash Valley seismic zones shows  earthquakes as circles. Red circles indicate earthquakes that occurred from 1974 to  2002 with magnitudes la

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