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The New Madrid region is located in the middle of the vast North American tectonic plate. In contrast to plate boundary settings like the coasts of California or Alaska where continuous deformation can be measured at the surface, some models predict that little deformation will occur during the period between large earthquakes in seismic areas ...
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. Location of earthquake epicenters in and near the New Madrid Seismic Zone (circles scaled according to magnitude.) Probability
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 New Madrid fault zone (NMFZ) is a long-established weakness in the Earth’s crust in the central and eastern US where earthquakes have occurred for hundreds of millions of years.
Oct 2, 2019 · Hough believes that this large aftershock occurred around dawn in the New Madrid region near the surface projection of the Reelfoot fault. 1812, January 23, 15:15 UTC, New Madrid, Missouri 9:15 am local time, Magnitude ~7.3. The second principal shock of the 1811-1812 sequence.
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).
John P. Rafferty. New Madrid earthquakes of 1811–12 - Fault Lines, Seismic Activity, Intensity: Over the past 4,500 years, a number of major earthquakes of magnitude 7.0 to 8.0 occurred in the NMSZ. These events include clusters of large earthquakes that have been dated to 2350 bce, 900 ce, and 1450 ce. The region also experienced two large ...
