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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 ...
The rupture also partly occurred on the New Madrid Fault, responsible for the great New Madrid earthquakes in 1812. The New Madrid tremors were the most powerful earthquakes to hit the contiguous United States. Various theories were put forward for the cause of the rupture.
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Apr 5, 2024 · Most of Illinois’ earthquakes occur in the southern half of the state near the famed New Madrid fault line. That fault system has caused some of the strongest earthquakes in United States...
This map shows the general area classified as the New Madrid Fault Zone.
Coordinates: 36.4°N 89.6°W. New Madrid fault and earthquake-prone region considered at high risk today.
The NMSZ consists of three fault segments: the northeast segment, the reelfoot thrust or central segment, and the southwest segment. Each segment is assumed to generate a deterministic magnitude 7.7 (Mw7.7) earthquake caused by a rupture over the entire length of the segment.
pp. 1135 - 1138. DOI: 10.1126/science.286.5442.1135. Abstract. Structural and geomorphic analysis of late Holocene sediments in the Lake County region of the New Madrid seismic zone indicates that they are deformed by fault-related folding above the blind Reelfoot thrust fault.
