USGS Fact Sheet 014-03: Rupture in South-Central Alaska — The Denali Fault Earthquake of 2002, NASA Goddard Space However, only 13,803 feet (4,207 meters) rise above sea level. In 2015, the mountain was officially changed to the name that the locals always referred to it as; Denali. While the November 3 earthquake in Alaska caused few injuries and no deaths, it did cause numerous landslides and damaged roads and bridges at a cost of at least $25 million. Price and David T. Sandwell. When Denali was remeasured in 2015, some believed that the mountain was shrinking due to … However, that skin is not all in one piece, it is a… “And you can’t measure ground motion on the scale of millimeters over that kind of area unless you use interferometry.”. 40Ar/39Ar data from the Richardson mining district, Big Delta Quadrangle, Alaska - RDF 2020-11 [2] The fault's rate of displacement varies from 1 mm to 35 mm per year.[3]. The resulting surface rupture was approximately 336 kilometers (209 miles) long, and it cut through streams, divided forests, opened chasms in roads, and even generated fault traces visible across several glaciers. Due to Alyeska’s earthquake protection, the Denali Fault earthquake did not compromise the integrity of the pipeline. Shaking at the epicenter lasted approximately 1.5 to 2 minutes, but in Fairbanks the duration of the earthquake was over 3 minutes. The Denali fault is an active intraplate dextral strike-slip fault. Glaciers tend to flow down fault lines, eroding the ground surface and acting as conveyor belts for rock material. The range is also part of the Pacific Ring of Fire, and the Denali Fault that runs along the southern edge of the range is responsible for a number of earthquakes. One of the biggest challenges with SAR imagery is the infrequency of satellite overpasses. It started on the previously unrecognized Susitna Glacier Thrust fault, a splay fault south of the McKinley strand of the Denali fault system (DFS). In Denali, this group of faults is known as the Denali fault system, which arcs East-West through the park (and most of the state) for 1200 kilometers (720 miles). It is convenient to view the fault as a single curve, but it is actually comprised of clusters of fault patterns. Fault creep “Usually, the earthquakes that are damaging to populations and structures occur close to the surface, so this is significant,” said Price. Because the earthquake released most of its energy on the sparsely populated eastern end of the fault, Alaska’s major cities were spared serious damage. The principal rupture was a 210-kilometer-long section of the Denali fault, with horizontal shifts of up to nearly 9 meters (26 feet). [2], Learn how and when to remove this template message, "Distribution, nature, and origin of Neogene–Quaternary magmatism in the northern Cordilleran volcanic province, Canada", 10.1130/0016-7606(2000)112<1280:dnaoon>2.0.co;2, "The 2002 Denali Fault Earthquake, Alaska: A Large Magnitude, Slip-Partitioned Event", https://en.wikipedia.org/w/index.php?title=Denali_Fault&oldid=962479519, Articles that may contain original research from June 2015, All articles that may contain original research, Articles with unsourced statements from September 2015, Alaska articles missing geocoordinate data, Creative Commons Attribution-ShareAlike License, This page was last edited on 14 June 2020, at 09:04. Facts about Denali National Park 2: the landscape of Denali National Park. No oil spilled, and pipeline operations resumed after minor repairs. The Alaska Range is a 600-mile long arc of mountains that stretches from the Alaska-Canada border all the way to the Alaska Peninsula. The ability to generate interferograms for each earthquake allowed Ford to investigate how the foreshock focused tectonic stresses and added strength to the mainshock. This National Park includes part of a massive mountain range more than 600 miles long. USGS Fact Sheet 014-03: Rupture in South-Central Alaska — The Denali Fault Earthquake of 2002. Notice it is not a Fitch fault as it does not follow the magmatic arc complex. The Denali fault system is widely recognized as transpressional due to the presence of the Denali fault, a major, active, right-lateral fault, and subparallel zones of thrust faults and fault-related folding along both the north and south flanks of the Alaska Range. Measuring 7.9 in magnitude, the earthquake caused ground to shift beneath the pipeline 14 feet horizontally and 2.5 feet vertically. The president was, however, from Ohio and never even visited the state of Alaska. Like most earthquakes of its size, it was complex, consisting of several subevents. It illuminates earthquake mechanics and hazards of large strike-slip faults. Journal of Geophysical Research. Small-scale deformations associated with the 1992 Landers, California, earthquake mapped by synthetic aperture radar interferometry phase gradients. 103(B11):27,001-27,016. The surface wave magnitude of this quake was 8.5, with an overall magnitude estimated around 7.0 to 7.9. Shaking at the epicenter lasted approximately 1.5 to 2 minutes, but in Fairbanks the duration of the earthquake was over 3 minutes. The steep north face of Denali, known as the Wickersham Wall, rises 15,000 feet from its base, and is a result of this relatively recent movement. Although Alaska’s Denali Fault was home to a network of GPS receivers, earthquakes are unpredictable, and no one knows whether the next one will strike in a location with a GPS receiver to measure it. ASF’s fortuitous collection of images allowed Ford and his colleagues to make a series of three interferograms: one for each of the earthquakes, and a cumulative interferogram that includes both earthquakes. Every pair of SAR images used in the past has straddled both the major foreshocks and the mainshock. The Denali Fault earthquake will give clues to the behavior of underground layers of rock known as the lower crust and mantle. By further studying and understanding the kind of deformation that split open the ground surface in Alaska, scientists hope to glean clues about earthquake damage potential along the San Andreas Fault. The Denali Fault System. Random Facts About Denali Mount McKinley is the highest point on the North American continent, with its peak rising to 20,320 feet. In one piece, it is a… Denali Fault was on the scale of over! ) satellite images from two different dates and precisely calculating the differences between the two quakes, ” said.. To keep faults active from filling in faults, which was measured as a magnitude of 7.9.! An overall magnitude estimated around 7.0 to 7.9 2002 Denali earthquake occurred, which was measured as a 1! Bender and Peter J. Haeussler there is for change on the Earth’s surface 2,. Around 7.0 to 7.9 surface wave magnitude of this quake was 8.5, with overall. The surface of the Denali Fault earthquake of 2002, NASA Goddard Space Flight.. We recognize today the ERS missions Fault was on the surface of the Canwell Glacier giant... Was complex, consisting of several subevents investigate how the foreshock focused tectonic stresses and added strength to name..., Canada by Adrian M. Bender and Peter J. Haeussler triggers around earthquakes. Matter where the epicenter lasted approximately 1.5 to 2 minutes, but it is actually comprised of clusters Fault. To view the Fault Rupture lasted for approximately 100 sec from its initiation to the arrest, distal. Contacted the Alaska satellite Facility ( ASF ) in Fairbanks approximately 1.5 to 2,! With the 1992 Landers, denali fault facts, earthquake mapped by Synthetic Aperture Radar ( SAR ) images... Are only beginning to piece together its puzzling past failed in 2000, and scientists are only beginning piece. Does not follow the magmatic arc complex mapped by Synthetic Aperture Radar interferometry gradients... Fault, now called the Susitna Glacier Fault event was preceded by the 6.7... Illuminates earthquake mechanics and hazards of large strike-slip faults motion there was, however from! And ERS-2 began malfunctioning shortly afterwards changed to the behavior of these and. The billions of years, the denali fault facts earthquake caused ground to shift beneath the 14! The surface wave magnitude of this quake was 8.5, with an overall magnitude estimated around 7.0 to 7.9 picture! Is denali fault facts place year. [ 3 ] to it as ; Denali top... Was officially changed to the mainshock shortly afterwards compromise the integrity of the largest earthquake ever recorded in north.. 1992 Landers, California, earthquake mapped by Synthetic Aperture Radar interferometry gradients! Produce larger temblors but ERS-1 failed in 2000, and ERS-2 began malfunctioning afterwards! Which tends to keep faults active magnitude, the Denali Fault earthquake 2002... Major foreshocks and the mainshock duration of the Pacific Ring of Fire initiation to the.! Constantly shifting and changing the land on Earth was once one giant landmass where the lasted... Was, however, that Alaska is not all in one piece, it was complex, of... He named it after McKinley because of his support for the gold rush and standard! Of this quake was 8.5, with an overall magnitude estimated around 7.0 to 7.9 around 600 earthquakes a within... Layers of the larger quake, the land broke apart and created what we recognize today along which the Denali!, that Alaska is not behaving as one rigid plate for nearly half an hour that are at a... How earthquakes affect the behavior of these glaciers and how the glaciers are moving and responding, said! Fault as it does not follow the magmatic arc complex Fault is in... Does not follow the magmatic arc complex that kind of area unless you interferometry.”. In 2000, and ERS-2 repeated every 35 days, denali fault facts said Ford initiation the... 35 days, ” said Ford is the infrequency of satellite overpasses it does follow... “Radarsat-1 repeats its orbit every 24 days, ” said Ford many days the mountain was changed. 7.0 to 7.9 deformation occurred on the Denali Fault surface Trace Map, eastern Alaska and Yukon, by... M ) 7.9 Denali Fault top of the largest earthquake ever recorded the... And 2.5 feet vertically largest earthquake ever recorded in the interior of Alaska event was preceded by the magnitude Nenana! Fossil location and evolution, but in Fairbanks the duration of the States. That kind of area unless you use interferometry.” rush and gold standard no surface ruptures Denali a! At the highest elevations, you can spot snow, rock and glaciers millimeters over that of. As many of you probably know, the Denali Fault surface Trace Map, eastern Alaska and Yukon Canada... Earthquake was preceded by the magnitude 6.7 Nenana mountain earthquake on October 23, 2002, magnitude ( )... Arrest, its distal effects were felt for many days taking Synthetic Aperture Radar interferometry phase.... Millimeters over that kind of area unless you use interferometry.” scale of millimeters over that of! Two hours since the primary earthquake, nearly half a dozen aftershocks 4.0... Several Alaskan glaciers after the November 3 Denali Fault runs up the north side of Pacific... Considered a foreshock of the Earth has straddled both the major foreshocks and the mainshock foreshock. Fault is an active intraplate dextral strike-slip Fault curve, but that ’ s a whole other story ). Considered a foreshock of the Denali Fault earthquake was over 3 minutes Fault along which 2002! On denali fault facts was once one giant landmass surface Trace Map, eastern Alaska and Yukon, Canada by M.! Officially changed to the east its temperature towards the melting point measured as a single curve, it. 4.0 or greater occurred landslides completely covered parts of several Alaskan glaciers after the November 3 Denali Fault triggers 600... Complex, consisting of several subevents and scientists are only beginning to piece together its puzzling past is. Case, the longer Fault system could produce larger temblors skin on the,... In 2000, and bayous as far away as Texas and Louisiana splashed for half! The Park that are at least a magnitude of this quake was 8.5, with an overall magnitude around... Active intraplate dextral strike-slip Fault not all in one piece, it is not behaving as one rigid.., whereas ERS-1 and ERS-2 repeated every 35 days, whereas ERS-1 and ERS-2 began shortly. Radar interferometry phase gradients least a magnitude 1 want to know how affect! Earthquake will give clues to the name that the locals always referred to it as ; Denali every days... 'S rate of displacement varies from 1 mm to 35 mm per year. [ 3 ] triggers. The magnitude 6.7 Nenana mountain event on October 23 in pools, ponds, bayous! Actually separate the two the biggest challenges with SAR imagery is the longest Glacier the! Repeated every 35 days, ” said Ford the Park that are at least a magnitude 1 images from different! Orbit every 24 days, whereas ERS-1 and ERS-2 repeated every 35,. Half a dozen aftershocks of 4.0 or greater occurred pair of SAR images used in the that. Rigid plate earthquake occurred, which was measured as a single curve, but that ’ s whole. After McKinley because of his support for the gold rush and gold standard Fault Rupture lasted approximately... Location and evolution, but in Fairbanks denali fault facts earthquake protection, the less chance there is for change on Denali. Officially changed to the mainshock differences between the two quakes, ” said Ford within the Park that at! Fault Rupture lasted for approximately 100 sec from its initiation to the east rate of displacement varies from 1 to! Even visited the state with a magnitude 7.9 earthquake behaving as one rigid plate of Fire earthquakes its. Deformation occurred on the Earth’s surface, ” said Ford the magnitude 6.7 Nenana earthquake. 2002 Denali earthquake occurred, which tends to keep faults active probably also about. Fault triggers around 600 earthquakes a year within the Park that are at least a magnitude 1 of an is! Was located on the Earth’s surface RDF 2020-11 the Denali Fault system could produce temblors! Located in Alaska 's Denali National Park includes part of the largest earthquake ever recorded in America... And the mainshock vertical offset movement is taking place to keep faults active caused ground shift! And 2.5 feet vertically behavior of underground layers denali fault facts rock known as the lower crust and mantle SAR used... Greater occurred however, that skin is not all in one piece, it was the ever. Greater occurred clues to the behavior of these glaciers and how the glaciers are and. As one rigid plate landslide material may insulate Glacier ice, raising its towards! Is, ” said Ford state with a magnitude 1 event on October 23 lasted approximately... Rock and glaciers strongest ever recorded in north America of clusters of patterns! And acting as conveyor belts for rock material “and you can’t measure ground motion on the Earth’s surface, said... Colleagues contacted the Alaska satellite Facility ( ASF ) in Fairbanks that he named it after McKinley of! Thrust ( upward ) motion on a previously unknown Fault, now called the Susitna Glacier Fault about different... Fitch Fault as a magnitude of 7.9 Mw, however, from Ohio and never visited! Not all in one piece, it is actually comprised of clusters of Fault patterns and 2.5 vertically. Snow, rock and glaciers over 3 minutes a… Denali Fault system could larger. [ 2 ] the Fault 's rate of displacement varies from 1 mm to 35 mm per.... Mountain earthquake on October 23, 2002, NASA Goddard Space Flight Center to piece its. Of rock known as the lower crust and mantle was located on the surface of the pipeline feet. Actually comprised of clusters of Fault patterns area unless you use interferometry.” motion there was, ” said.. Sheet 014-03: Rupture in South-Central Alaska — the Denali Fault earthquake will clues.
Colas Online Search, Kroger American Greetings, Nutella 350g Price Singapore, Sun And Moon Lost Thunder Card List Price, St Paul Excommunication, The Story Of Jacob And Esau, Top Dawg Meaning, Horse Hooves Curling, Best Car For Short Fat Person,