2010. U.S. National Atlas Historic Earthquakes represents the locations of significant, historic earthquakes in United States and adjacent Canada and Mex... Environmental Systems Research Institute (Redlands, Calif.).
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2010. U.S. National Atlas Volcanoes represents volcanoes thought to be active in the last 10,000 years (Holocene), in and near the United States. The dat... Environmental Systems Research Institute (Redlands, Calif.).