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New Fact Sheet: Earthquake Hazard in the New Madrid Seismic Zone Remains a Concern
There is broad agreement in the scientific community that a continuing concern exists for a major destructive earthquake in the New Madrid seismic zone. Many structures in Memphis, Tenn., St. Louis, Mo., and other communities in the central Mississippi River Valley region are vulnerable and at risk from severe ground shaking. This assessment is based on decades of research on New Madrid earthquakes and related phenomena by dozens of Federal, university, State, and consulting earth scientists. |
Open File Report: Earthquakes in Ohio and Vicinity 1776-2007, by Richard L. Dart and Michael C. Hansen |
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Fact sheet on central U.S. hazard addressing the significance of the earthquake threat, how likely large earthquakes are, and how likely damaging shaking is.
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Urban Hazard Maps
Download maps of earthquake ground shaking and liquefaction potential at a scale appropriate for urban planning and development, disaster mitigation and response planning. These account for local variations in soils and their effects on shaking. Raw data and posters also available.
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Virginia Seismicity Map
This map summarizes two and a third centuries of earthquake activity. The seismic history consists of letters, journals, diaries, and newspaper and scholarly articles that supplement seismograph recordings (seismograms) dating from the early twentieth century to the present. All of the pre- instrumental (historical) earthquakes were large enough to be felt by people or to cause shaking damage to buildings and their contents. Later, widespread use of seismographs meant that tremors too small or distant to be felt could be detected and accurately located.
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Earthquake Event Posters
Download PDFs about recent significant earthquakes in the Central and Eastern U.S.
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