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New Madrid Seismic Zone. The New Madrid Seismic Zone (NMSZ) ( / ˈmædrɪd / ), 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 .
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. In St. Louis, Missouri, many houses were severely damaged and their chimneys were toppled. This shock was definitively attributed to the Reelfoot Fault by Johnston and Schweig.
Geography of St. Louis. St. Louis is located at 38°38′53″N 90°12′44″W. [1] The city is built primarily on bluffs and terraces that rise 100–200 feet (30–61 m) above the western banks of the Mississippi River, just south of the Missouri -Mississippi confluence. Much of the area is a fertile and gently rolling prairie that features ...
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 am on November 9, it measured 5.4 on the Richter scale. [5] Although no fatalities occurred, the event caused considerable structural damage to buildings, including the toppling of chimneys and ...
An earthquake of magnitude 2.8 has been reported in southern Illinois, near the Missouri state line, the U.S. Geological Survey reported. Parts of Illinois are located within the 150-mile-long ...
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 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 Indiana.
Gateway Arch. / 38.6245; -90.1847. The Gateway Arch is a 630-foot-tall (192 m) monument in St. Louis, Missouri, United States. Clad in stainless steel and built in the form of a weighted catenary arch, [5] it is the world's tallest arch [4] and Missouri's tallest accessible structure.
Topographic map of the bootheel and surrounding areas of Missouri and neighboring states. The Missouri Bootheel is a salient (protrusion) located in the southeasternmost part of the U.S. state of Missouri, extending south of 36°30′ north latitude, so called because its shape in relation to the rest of the state resembles the heel of a boot.