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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.
Earthquakes in the New Madrid and Wabash Valley seismic zones from 1974 to 2002, with magnitudes larger than 2.5. The zone had four of the largest earthquakes in recorded North American history, with moment magnitudes estimated to be as large as 7 or greater, all occurring within a 3-month period between December 1811 and February 1812. Many of ...
1811–1812 New Madrid earthquakes: December 8, 1812: California: 6.9 M la, 7.5 M w ... Lists, Maps, and Statistics at United States Geological Survey (USGS)
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 discoveries of Earth's tectonic plates, [1] seismotomography imaging technique, [2] observations using space satellites from outer space, [3] artificial intelligence (AI)-based ...
The New Madrid earthquakes of 1811 and 1812 were some of the largest earthquakes recorded in U.S. history, according to USGS. In slightly over a year, three earthquakes, all with a magnitude of 7. ...
1811–1812 New Madrid earthquakes; Geology of Illinois; Illinois Basin; ... Miscellaneous Field Studies Map 1143. United States Geological Survey. doi:10.3133/mf1143.
From Dec. 16, 1811, to Feb. 7, 1812, three major earthquakes violently shook part of the central United States. Trees bent and snapped. Trees bent and snapped. Sand blows erupted.
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.