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The New Madrid seismic zone is a source of continuing small and moderate earthquakes, which attest to the high stress in the region and indicate that the processes that produced the large earthquakes over the previous 4,500 years, are still operating. It is the most seismically active area of the United States east of the Rockies.
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.
Map Releases. Types of damage that could result from a great earthquake in the New Madrid, Missouri, seismic zone. January 1, 1984. View Plate. In the winter of 1811–1812 a series of three great earthquakes occurred in the New Madrid seismic zone.
At 2:15 a.m. on December 16, 1811, residents of the frontier town of New Madrid, in what is now Missouri, were jolted from their beds by a violent earthquake. The ground heaved and pitched,...
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. In 1811-1812, three large earthquakes (up to magnitude 7.5) caused severe damage to the area. 1 At the time, the region was sparsely populated; today it is a ...
(a) Location map of the New Madrid seismic zone (NMSZ), illustrating major faults and approximate earthquake epicenters of the 1811–1812 earthquake sequence. Inset shows location in central...
