New_Madrid_and_Wabash_seizmic_zones-USGS_mod.png

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 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. The Cottage Grove Fault is indicated by the green line.
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This is a retouched picture , which means that it has been digitally altered from its original version. Modifications: Added Cottage Fault . The original can be viewed here: New Madrid and Wabash seizmic zones-USGS.png : . Modifications made by Ruslik0 .


Public domain
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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This image is a derivative work of the following images:

  • File:New_Madrid_and_Wabash_seizmic_zones-USGS.png licensed with PD-USGov-USGS
    • 2008-04-25T02:30:32Z Kbh3rd 748x819 (478218 Bytes) {{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

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