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denali fault earthquake

January 1st,
2021

2004; Doser 2004). (Photo and interpretation by Wesley K. Wallace, Geophysical Institute, University of Alaska Fairbanks), Of the population centers, the hardest hit were the villages of Mentasta and Northway, located at the eastern end of the rupture zone. In contrast, the 1994 Northridge, California, earthquake, which had the same magnitude, caused 67 deaths and $40 billion in damage when it struck the densely populated Los Angeles region. In 2002, the Denali Fault ruptured in a sequence of earthquakes that commenced with the October 23 M6.7 Nenana Mountain right-lateral strike-slip earthquake and culminated with the November 3, M7.9 Denali earthquake which started as a thrust earthquake along a then unrecognized fault and continued with a larger right … No oil spilled, and pipeline operations resumed after … AEIC receives data from more than 370 seismic stations, integrating all seismic networks in Alaska. This event caused significant damage to the transportation systems in central Alaska. Alaska's network of faults is a result of tectonic activity; the Pacific Plate is actively subducting (sliding under) the North American Plate, and the Denali Fault is located on the boundary between the two plates. Additional instruments were deployed after the Denali Fault quake, and as of December 2002, a total of 26 temporary seismic stations were gathering data on the quake's aftershocks. Deborah and Hess rise to about 12,000 feet (3650 m) just north of the epicenters and the bend in the Denali fault. Mountainsides gave way, burying the valleys and glaciers below in deposits of rock and ice as much as 15 feet thick. It started with thrust (upward) motion on a previously unknown fault, now called the Susitna Glacier Fault. Our research team examines major fault systems in Alaska capable of generating large earthquakes, including the Alaska-Aleutian subduction zone, the Denali Fault system, and the Queen Charlotte-Fairweather Fault system. This presents a rare opportunity to catch a major earthquake in the act. Seiches were seen as far away as Lake Pontchartrain in Louisiana. 40Ar/39Ar data from the Richardson mining district, Big Delta Quadrangle, Alaska - RDF 2020-11 The Trans-Alaska Pipeline suffered some damage, but no oil spills occurred. Its epicenter was located on the Denali fault 22 km east of the M 7.9 event epicenter. It started on the previously unrecognized Susitna Glacier Thrust fault, a splay fault south of the McKinley strand of the Denali fault system (DFS). They also located major landslides caused by the quake. The 1857 California and 2002 Alaska earthquakes struck far from major cities, causing little or no loss of life. The MW (moment magnitude) 7.9 Denali fault earthquake on 3 November 2002 was associated with 340 kilometers of surface rupture and was the largest strike-slip earthquake in North America in almost 150 years. The second largest instrumentally recorded earthquake in the world occurred along the eastern Aleutian subduction zone, the Mw9.2 Great Alaskan earthquake of 1964. Shortly after midday on November 3, 2002, a magnitude 7.9 earthquake ruptured the Denali Fault in the rugged Alaska Range, about 90 miles south of Fairbanks. The Denali Fault earthquake ruptured the Earth's surface for 209 miles, crossing beneath the vital Trans-Alaska Oil Pipeline, which carries 17% of the U.S. domestic oil supply. [[{"type":"media","view_mode":"media_large","fid":"155","attributes":{"alt":"","class":"media-image","height":"369","typeof":"foaf:Image","width":"480"}}]], white line - mapped rupture | red lines - fault traces | dashed black line - Trans-Alaska Pipeline | black lines - roads | blue lines - major rivers, This high-altitude view shows the approximate locations of the earthquake epicenters. It was the largest inland earthquake to hit North … The Parks Highway, which connects Anchorage and Fairbanks, lies immediately east of the river north of the fault, but diverges from the river to the south. USGS studies of the Denali Fault earthquake are part of the National Earthquake Hazard Reduction Program's ongoing efforts to safeguard lives and property from the future quakes that are certain to strike in Alaska, California, and elsewhere in the United States. This places the rupture in the same class as those that produced the San Andreas fault's two historical great earthquakes in 1906 and 1857. The 2002 M7.9 Denali fault earthquake resulted in 340 km of ruptures along three separate faults, causing widespread liquefaction in the fluvial deposits of the alpine valleys of the Alaska Range and eastern lowlands of the Tanana River. • The 2002 Denali Fault earthquake – United States Geological Survey Compiled By Gary S. Fuis and Lisa A. Wald, Edited by James W. Hendley II and Peter H. Stauffer Graphic design by Susan Mayfield, Sara Boore, Eleanor Omdahl, and J. Luke Blair; Web layout by Carolyn Donlin, COOPERATING ORGANIZATIONS Alaska Division of Geological and Geophysical Surveys Alaska Earthquake Information Center, Geophysical Institute, University of Alaska Fairbanks Alaska Volcano Observatory Alyeska Pipeline Service Company California Institute of Technology Central Washington University Humboldt State University University of California Berkeley West Coast and Alaska Tsunami Warning Center, For more information contact: Earthquake Information Hotline (650) 329-4085 U.S. Geological Survey, Mail Stop 977 345 Middlefield Road, Menlo Park, CA 94025 Visit the USGS Earthquake Hazards Program website to learn more, PDF version of this fact sheet (2.2 MB) REDUCING EARTHQUAKE LOSSES THROUGHOUT THE UNITED STATES, For questions about the content of this report, contact Gary Fuis, Download the current version of Acrobat Reader for free, | Help | PDF help | Geopubs main page | Fact Sheets |, | Department of the Interior | Privacy Statement | Disclaimer | Accessibility | URL of this page: https://pubs.usgs.gov/fs/2003/fs014-03/ Maintained by: Michael Diggles Created: February 5, 2003 Last modified: May 17, 2005 (mfd), the pipeline did not break in the quake, the 2002 Denali Fault earthquake occurred on a "strike-slip" fault, Denali Fault quake is similar to three earthquakes that ruptured the San Andreas Fault in the past few centuries, USGS Earthquake Hazards Program website. 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