Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Instrumental earthquake locations
This cover contains the catalog of earthquake locations, within the project boundary, recorded by the Saint Louis University and Memphis State University seismic networks from July 1974 through December 1995.
This digital map database consists of the ESRI ARC/INFO Version 7.0.2 coverages used to generate the plates in Professional Paper 1538-M (1994). Base-data is from 1:2,000,000-scale Digital Line Graph (DLG) data (roads, railroads, streams, water bodies, and international boundaries) and 1:100,000 scale DLG data (state and county boundaries).
Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction surveys between 1990 and 1994 in Indiana
The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoliquefaction features, including shaking-induced sandblows and dikes that fed them. Over several summer field seasons between 1990 and 1994, Cheryl and Pat Munson, along with several of their students, searched ditches and river banks for evidence of liquefaction. They found numerous banks with shaking-induced sandblows and the dikes that fed them. This database includes the location of dikes that the Munsons and those with them observed and measured. Dike thickness was divided into 5 classes, 1 being the smallest at 0-4 cm,...
Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Seismic refraction lines
This cover includes seismic refraction lines that have geophysical cross sectional interpretations constraining subsurface structures that may penetrate to hypocentral depths. Lines were gathered from theses, dissertations, and publications.