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The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), 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.
August 23, 2011 2011 Virginia earthquake Massachusetts: 5.9 November 18, 1755 1755 Cape Ann earthquake Michigan: 4.6 M L: August 10, 1947 [48] Minnesota: 4.6 M L: July 9, 1975 1975 Morris earthquake Mississippi: 7.6–7.9 December 16, 1811 1811–1812 New Madrid earthquakes Missouri: 7.6–7.9 December 16, 1811 1811–1812 New Madrid ...
English: Earthquakes recorded in the New Madrid Seismic Zone — in the Mississippi River Valley. Located primarily through Arkansas, Missouri, and Tennessee in the central United States from June 1974 to July 2011. Without indicication of magnitude. Most of the tremors represented on the map were below the threshold of human sensitivity.
A magnitude 5 earthquake may affect 5-15 times larger of an area in the New Madrid Seismic Zone compared to California, largely due to the crustal geology of the two areas.
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.
An undated photo from the US Geological Survey depicts a landslide trench and ridge in the Chickasaw Bluffs, east of Reelfoot Lake, Tennessee, resulting from the 1811 to 1812 New Madrid earthquakes.
The 2011 Colorado earthquake caused damage in Segundo, Cokedale, Valdez and Trinidad. Rockslides occurred on State Highway 12. — — 23 [77] United States, Virginia, 11 km southwest of Mineral: 5.8 6.0 VIII The 2011 Virginia earthquake was felt by more people than any other quake in U.S. history, with tremors also being felt in Canada. [78]
Examples of intraplate earthquakes include those in Mineral, Virginia, in 2011 (estimated magnitude 5.8), Newcastle, New South Wales in 1989, New Madrid in 1811 and 1812 (estimated magnitude as high as 8.6), [6] the Boston (Cape Ann) earthquake of 1755 (estimated magnitude 6.0 to 6.3), earthquakes felt in New York City in 1737 and 1884 (both ...