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  1. Other relatively young faults, which are not necessarily associated with recent earthquakes, or the main seismicity trend in the New Madrid region, are shown in this map. It shows 20 localities where geologists have found and published their findings on faults or evidence of large earthquakes (from sand blows; see image to the right).

  2. Reelfoot Rift and the New Madrid Seismic Zone in a 3D topographic image. Magnetic potential map of the Reelfoot Rift. 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 ...

  3. New Madrid Seismic Zone Map. New Madrid earthquake map: Topographic map showing earthquakes greater than magnitude 2.5 (circles) of the central United States. Red circles are earthquakes that occurred after 1972 from the USGS Preliminary Determination of Epicenters catalog.

  4. This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis).

  5. New Madrid Seismic Zone (NMSZ), region of poorly understood, deep-seated faults in Earth’s crust that zigzag southwest-northeast through Arkansas, Missouri, Tennessee, and Kentucky, U.S. Lying in the central area of the North American Plate, the seismic zone is about 45 miles (70 km) wide and about.

    • The Editors of Encyclopaedia Britannica
  6. The trends indicate a four-segment, zig-zag fault system with a total length of about 125 miles stretching from east central Arkansas northeastward through Missouri, Tennessee, Kentucky and into southern Illinois.

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  8. This map shows the general area classified as the New Madrid Fault Zone.

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