Investigating Seismotectonics in the Eastern United States Using a Geographic Information System

摘要

A GIS database of earthquake, geological and geophysical data was constructed to study the correlation of the seimicity with the geology and tectonics of the most seismically active areas in the central and eastern U.S. (CEUS), namely: (1) the seismically active area of the Appalachians and east coast, from Maine to Georgia, (2) the broadly active region around the New Madrid seismic zone (Illinois and Indiana to Arkansas and Mississippi), and (3) the broad area of low activity throughout Kentucky and Ohio. The GIS database analyzed consisted of the NCEER earthquake catalog, the magnetic residual field, gravity residual field, topography, crustal stress measurements, regional geology, and hydrography. Multivariate statistical analyses were carried on three different datasets.