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Fact Sheet 2004–3033
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Understanding Earthquake Hazards Throughout the United States

Quaternary Fault and Fold Database for the Nation

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What are the faults in my area and where are they? When did they last have a large earthquake? Now you can find the answers to these questions online at through a user-friendly interface developed by the U.S. Geological Survey (USGS). This is the first nationwide compilation to provide up-to-date and comprehensive geologically based information on known or suspected active faults.

Version 1.1

Posted December 2005

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