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New Madrid Seismic Zone - Quaternary Fault Localities. Earthquakes with magnitudes equal to or larger than 2.5 are shown by the yellow dots. (Public domain.) When people think of earthquakes in the United States, they tend to think of the west coast. But earthquakes also happen in the eastern and central U.S.
The New Madrid Seismic Zone (NMSZ) ( / ˈmædrɪd / ), sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri .
The contact person at USGS for New Madrid earthquake studies is Martitia Tuttle, Central and Eastern U.S. Regional Coordinator, Earthquake Hazards Program, U.S. Geological Survey, 3876 Central Avenue, Suite 2, Memphis, Tennessee 38152-3050, phone: 901-678-4974, email: mptuttle@usgs.gov.
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A 2004 HAZUS report prepared by FEMA, based on a 7.7 earthquake occurring in the New Madrid Seismic Zone, estimates earthquake damages to be $296 billion dollars across the region and nearly 730,000 people displaced from their homes. In Missouri, the report estimates a direct economic loss of $69 billion dollars and nearly 87,000 damaged buildings.
The New Madrid seismic zone has been the source of multiple major (M ~7.0–7.5) earthquakes in the past 2 ka, yet the surface expression of recent deformation remains ambiguous.
By: Mark Mancini. This map of the New Madrid Seismic Zone shows earthquakes with magnitudes larger than 2.5 as yellow circles. USGS. Dec. 3, 1990, was a day of anxiety for America. A prediction made by climate consultant Iben Browning held that there'd be a "50 percent chance" of a magnitude 7 earthquake rocking the nation on this date.
