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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.
1811–1812 New Madrid earthquakes; Geology of Illinois; Illinois Basin; New Madrid seismic zone; Sandwich Fault Zone; ... Miscellaneous Field Studies Map 1143 ...
Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley seismic zone (also known as the Wabash Valley fault system or fault zone) is a tectonic region located in the Midwestern United States, centered on the valley of the lower Wabash River, along the state line between southeastern Illinois and southwestern ...
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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 ...
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It was also possible that the rupture involved more than one fault. Inferred aftershock locations suggest compatibility with the latter model, and agrees with the intensity distribution which suggest a northeast-propagating rupture. All three models indicate the earthquake was a buried rupture event along a 5–20 km (3.1–12.4 mi) fault. [2]
That is troubling news given AAA projects 79.9 million people will travel 50 miles or more from their homes for Thanksgiving between Tuesday and Monday, Dec. 2. That represents 1.7 million more ...