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New Madrid fault and earthquake-prone region considered at high risk today. 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.
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.
The 1968 Illinois earthquake (a New Madrid event) [4] was the largest recorded earthquake in the U.S. Midwestern state of Illinois. Striking at 11:02 a.m. on November 9, it measured 5.3 on the Richter scale . [ 5 ]
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 New Madrid seismic zone located in the midcontinental United States is a region of concentrated seismic activity. This zone is within the Reelfoot Rift, a failed rift trending northeast. Faulting within the rift occasionally causes small to moderate earthquakes.
New Madrid was the epicenter of the powerful 3-month 2,000-earthquake 1811–1812 New Madrid earthquakes. In 2003, the U.S. Geological Survey predicted that another major earthquake will happen in New Madrid within the next 50 years, [ 18 ] a theory that was rejected by the geophysicist Seth Stein in his 2010 book Disaster deferred: how new ...
That envisions a magnitude 7.8 earthquake that could result in 1,800 deaths and nearly 50,000 injuries — the deadliest quake in modern Southern California history. More than 1,000 of those ...