Earthquakes pose significant risk to more than 143 million Americans. The USGS is the only Federal agency with responsibility for recording and reporting earthquake activity nationwide, and maintains the National Seismic Hazard Model. Citizens, emergency responders, and engineers rely on the USGS for accurate and timely information on where an earthquake occurred, how much the ground shook in different locations, the expected economic and human impacts, and what the likelihood is of future significant ground shaking.
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