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Oct 2, 2019 · On the basis of the large area of damage (600,000 square kilometers), the widespread area of perceptibility (5,000,000 square kilometers), and the complex physiographic changes that occurred, the New Madrid earthquakes of 1811-1812 rank as some of the largest in the United States since its settlement by Europeans.
New Madrid fault and earthquake-prone region considered at high risk today. The 1811–1812 New Madrid earthquakes (/ ˈ m æ d r ɪ d /) 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 ...
At 2:15 a.m. on December 16, 1811, residents of the frontier town of New Madrid, in what is now Missouri, were jolted from their beds by a violent earthquake. The ground heaved and pitched,...
Hundreds of aftershocks were felt in 1813. The geologic record of pre-1811 earthquakes reveals that the New Madrid seismic zone has repeatedly produced sequences of major earthquakes, including several of magnitude 7 to 8, over the past 4,500 years.
More than nineteenth-century history is at stake in the answer to that question. Recent research on New Madrid area seismicity has demonstrated that the 1811–12 earthquakes were not simply an anomaly, but part of a continuing series of earthquakes that goes back several thousand years.
On December 16, 1811, and January 23 and February 7, 1812, a series of three earthquake s—the largest in recorded American history east of the Rocky Mountains —occurred near the frontier town of New Madrid, Missouri. (epicentre 36.6° N 89.6° W), each measuring greater than magnitude 7.0.
New Madrid earthquakes of 1811–12 - Fault Lines, Seismic Activity, Intensity: Over the past 4,500 years, a number of major earthquakes of magnitude 7.0 to 8.0 occurred in the NMSZ. These events include clusters of large earthquakes that have been dated to 2350 bce, 900 ce, and 1450 ce.
