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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.
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.
December 16, 1811 1811–1812 New Madrid earthquakes Missouri: 7.6–7.9 December 16, 1811 1811–1812 New Madrid earthquakes Montana: 7.2 August 17, 1959 1959 Hebgen Lake earthquake Nebraska: 7.0 November 15, 1877 [49] Nevada: 7.3 December 16, 1954 1954 Fairview earthquake New Hampshire: 6.5 June 1, 1638 1638 New Hampshire earthquake New ...
Massive earthquakes have rocked the New Madrid Seismic Zone, which includes Memphis. ... The USGS estimates that there’s a 7% to 10% chance the NMSZ would get a repeat of the 1811-12 earthquakes ...
December 16, 1811 08:00 New Madrid, Missouri, United States 1811–1812 New Madrid earthquakes: 36.6 −89.6 8.1 M I: USGS January 23, 1812 15:00 New Madrid, Missouri, United States 1811–1812 New Madrid earthquakes: 36.6 −89.6 7.8 M I: USGS February 7, 1812 09:45 New Madrid, Missouri, United States 1811–1812 New Madrid earthquakes: 36.6 ...
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.
In 1811–1812, a series of large earthquakes occurred on the rift, causing great devastation. [ 2 ] Martin and Hough postulated three different plausible events, a north-northwest rupture from Henson Lake to Charleston, a northeast rupture on the western boundary faults of the Reelfoot Rift, or north-northeast or north-northwest rupture within ...
Since the three damaging earthquakes that occurred in the American Midwest and the United States East Coast (1755 Cape Ann, 1811–1812 New Madrid, 1886 Charleston) were well known, it became apparent to settlers that the earthquake hazard was different in California.