1973. American Geological Institute, Geological Survey (U.S.), Environmental Systems Research Institute (Redlands, Calif.), National Earthquake Information Center, and National Geophysical Data Center. This datalayer is a point coverage representing earthquake epicenters (1973 through March, 2003). Historical data for this layer were derived from:... American Geological Institute.
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Geological Survey (U.S.), National Geophysical Data Center, and National Earthquake Information Center. This shapefile includes points which represent locations of significant historical earthquakes worldwide documented from 2150 B.C. until 1994 A.D. ... American Geological Institute.
2012. Rukstales, Kenneth S. (compiler). This polygon shapefile represents seismic hazards in the United States. The data represent a model showing the probability that ground motion will ... National Atlas of the United States.
2005. Geological Survey (U.S.). This point shapefile contains the locations and attributes of significant, historic earthquakes that caused deaths, property damage, and geological... National Atlas of the United States.