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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 USGS issued a fact sheet in 2009 stating the estimate of a 7–10% chance of a New Madrid earthquake of magnitude comparable to one of the 1811–12 quakes within the next 50 years, and a 25–40% chance of a magnitude 6 earthquake in the same time frame. [32] In July 2014, the USGS increased the risk assessment for the New Madrid area. [33]
Historical earthquakes is a list of significant earthquakes known to have occurred prior to the early 20th century. As the events listed here occurred before routine instrumental recordings — later followed by seismotomography imaging technique, [1] observations using space satellites from outer space, [2] artificial intelligence (AI)-based earthquake warning systems [3] — they rely mainly ...
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.
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 Jersey: 5.3 November 29 ...
The following is a timeline of the history of the city of St. Louis, ... City founding and early history; 1763–1803; ... New Madrid earthquake. [9] 1812 ...
New Madrid County, Missouri, a county in the U.S. state of Missouri; New Madrid, Missouri, a city in New Madrid County; New Madrid Seismic Zone, a major seismic zone in Missouri, Tennessee, and Arkansas New Madrid earthquake, a series of four earthquakes that occurred in late 1811 and early 1812 "New Madrid" (song), by Uncle Tupelo from their ...
Pressure on the fault where the 1811–1812 New Madrid earthquakes occurred was believed to be increasing, [23] but a later study by Eric Calais of Purdue University and other experts concluded the land adjacent to the New Madrid fault was moving less than 0.2 mm (0.0079 in) a year, increasing the span between expected earthquakes on the fault ...