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What is New Madrid seismic zone - Quaternary Fault localities?
What is the New Madrid seismic zone?
Where did the New Madrid earthquake come from?
What was the magnitude of the New Madrid earthquake?
Learn about the history, geology, and hazards of the New Madrid seismic zone, where the largest earthquakes in the eastern U.S. occurred in 1811-1812. See maps, images, and sources of the faults, liquefaction, and effects of the earthquakes.
The New Madrid Seismic Zone (NMSZ) (/ ˈ m æ d r ɪ d /), sometimes called the New Madrid Fault Line, 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.
The New Madrid seismic zone is a source of continuing small and moderate earthquakes, which attest to the high stress in the region and indicate that the processes that produced the large earthquakes over the previous 4,500 years, are still operating.
Johnston and Schweig attributed this earthquake to a rupture on the New Madrid North Fault. This may have placed strain on the Reelfoot Fault. February 7, 1812, 9:45 UTC (3:45 am local time): M 7.4–8.6, epicenter near New Madrid, Missouri. The town of New Madrid was destroyed.
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,...
