The U.S. Geological Survey maintains a Web-searchable, relational database of
information on nearly 2,000 features with known or suggested Quaternary
tectonic faulting nationwide (http://earthquake.usgs.gov/qfaults/). The two main uses of the database are (1) for scientific research and (2)
to supply data required to calculate estimators of fault activity for
use in seismic-hazard computations. The new and updated assessments here
are part of the preparation for the 2007–2008 version of the U.S. Geological
Survey’s national seismic-hazard maps. Eventually, these assessments
will be incorporated into the Web-searchable database.
Twelve of the 13 assessments here are new, and the thirteenth incorporates significant
new information. The new assessments describe faults, fields of paleoliquefaction
features, seismic zones, and geomorphic features for which too little
geologic information was available to write an assessment before now.
Some of the assessments describe work in progress. They cite mainly abstracts
and informal reports to funding agencies. These references are likely
to be superseded eventually by formal journal papers.
Version 1.0
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Posted October 2005
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