10 Facts about San Andreas Fault The San Andreas Fault is a continental transform fault that extends roughly 1300 km (810 miles) through California. Housing units, July 1, 2019, (V2019) 2,284,847: Owner-occupied housing unit rate, 2014-2018: 68.6%: Median value of owner-occupied housing units, 2014-2018 Table-top items tumbled to the floor. The GSA reports that most damage was in northern Alabama: "This shock, located about 400 miles east of Alabama's border, caused minor damage in the northeastern part of the state. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal). It was noted by residents in seven States and covered 100,000 square miles. A major earthquake event occurred when the Alabama Territory was still frontier land, with three 8.0-plus magnitude quakes occurring in 1811 and 1812 along the New Madrid Fault. This is an area of stress in the Earth. The quake, which was felt in several states, was deep enough to prevent significant damage, although some chimneys were damaged and one large sinkhole formed.Note to readers: if you purchase something through one of our affiliate links we may earn a commission.Registration on or use of this site constitutes acceptance of our © 2020 Advance Local Media LLC. The quake was felt in Georgia, Indiana, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee. Aftershocks occurred for another 10 days.On April 23, 1957, an earthquake struck near the Tennessee River below Guntersville Dam and was felt through northern and central Alabama. Minor damage to several chimneys; one report of cement steps cracked in two; and several small cracks in walls. Many people don't realize north Alabama lies in the impact zone of the New Madrid fault line, a sleeping giant that is approximately 20 times larger than California's famed San Andreas fault. A 1933 photo of the Alexander-Hurt-Whatley house in Tuskegee, built in 1845, shows a large crack in one wall purporting to have been caused by the Charleston quake. Here, sections of rock move past each other. Logan’s Line, also called Logan’s Fault, in geology, prominent zone of thrust faulting in northeastern and eastern North America related to the culmination of the Taconic orogeny during the Ordovician Period (488.3 million to 443.7 million years ago). Vol. Alabama spans three continental geologic provinces as defined by the United States Geological Survey, the Atlantic Plain, Appalachian Highlands, and Interior Plains.
American Geologist. A fault is a fracture, or break, in the Earth's crust (lithosphere).Some faults are active. Earthquakes occur on faults - strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults, and thrust earthquakes occur on thrust or reverse faults. However, there are a few others that are close to or even as big as the San Andreas fault that are essential to these earthquake facts. The GSA reported: "Near the epicenter, chimneys were knocked down, windows broken, and frame buildings 'badly shaken.' It is not meant to be a list of every earthquake to hit Alabama. Tremors were felt in Lauderdale, Lawrence and Morgan counties in Alabama and parts of Tennessee.A 4.9 magnitude quake struck near Brewton on Oct. 24, 1997. At fault lines the rocks are sliding past each other and will eventually cause a crack in the Earth’s surface. New Madrid Fault Line: The New Madrid fault line has recorded over 4000 earthquakes of various scales over the last four decades.Also referred to as the New Madrid Seismic Zone, this region is one of the most vulnerable region in the United States. The GSA reported it was "Felt by, awakened, and alarmed many.
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facts about alabama fault lines