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The New Madrid Seismic Zone (NMSZ), 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 New Madrid fault system was responsible for the ...
The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of similar magnitude followed in January and February 1812.
Wabash Valley Seismic Zone. Coordinates: 38°43′N 87°41′W. Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley Seismic Zone (also known as the Wabash Valley Fault System or Zone) is a tectonic region located in the Midwestern United States, centered on ...
The 1968 Illinois earthquake (a New Madrid event) [ 4 ] was the largest recorded earthquake in the U.S. Midwestern state of Illinois. Striking at 11:02 a.m. on November 9, it measured 5.3 on the Richter scale. [ 5 ] Although no fatalities occurred, the event caused considerable structural damage to buildings, including the toppling of chimneys ...
This New Madrid area produced a series of three major earthquakes in the winter of 1811-12. They occurred on Dec. 16, 1811, with an estimated 7.5 magnitude; on Jan. 23, 1812, with a 7.3 magnitude ...
The New Madrid Seismic Zone located in the midcontinental United States is a region of concentrated seismic activity. This zone is within the Reelfoot Rift, a failed rift trending northeast. Faulting within the rift occasionally causes small to moderate earthquakes.
New Madrid lies far from any plate boundaries, but it is on the New Madrid Seismic Zone. [7] The major earthquake was felt as far away as the East Coast. [8] Starting in 1838, New Madrid was on the Trail of Tears that saw thousands of Indians forcefully removed from Eastern lands and moving to Oklahoma. [9]
Distribution of seismicity associated with the New Madrid Seismic Zone (since 1974). This zone of intense earthquake activity is located deep within the interior of the North American plate. An intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, in contrast to an interplate earthquake on the boundary of a ...