Description: This database contains information on faults and associated folds in the United States that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). Maps of these geologic structures are linked to detailed descriptions and references.
Copyright Text: U.S. Geological Survey and California Geological Survey, 2006, Quaternary fault and fold database for the United States, accessed July 21, 2016, from USGS web site: http//earthquake.usgs.gov/hazards/qfaults/.