The majority of landslides clustered in a narrow band extending about 8 to 12 miles on either side of the rupture. Evidence of the 1685 earthquake was only discovered in the past 20 years. Called the Denali Fault earthquake, this shock was the strongest ever recorded in the interior of Alaska. The earthquake began at 1:12 p.m. Alaska local time, and was centered approximately 135 kilometers (84 miles) south of Fairbanks and 283 kilometers (176 miles) north of Anchorage. Following the Denali Fault earthquake, adjacent fault segments have been stressed, increasing the likelihood of additional earthquakes on those segments. Geotechnical Observations of the November 3, 2002 M7.9 Denali Fault Earthquake. 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. Seiches were seen as far away as Lake Pontchartrain in Louisiana. 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. If we’re talking sheer magnitude, the largest recorded earthquake on North American soil hit Alaska on November 3, 2002. 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 largest inland earthquake in North America in almost 150 years struck Alaska on November 3, 2002. Although comparable in size and type to the quake that devastated San Francisco in 1906, the Denali Fault earthquake caused no deaths and little damage to structures because it struck a sparsely populated region of south-central Alaska. The Denali Fault event was felt as far as Washington and caused seiches in pools and lakes as far as Texas and Louisiana. The Nenana Mountain and Denali Fault earthquakes generated a vigorous aftershock sequence. Following the Denali Fault earthquake, Lake Union in Seattle experienced an earthquake-induced seiche, or water sloshing, which knocked many houseboats off their moorings and caused minor damage. (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. The Denali fault earthquake sequence be-gan with the moment magnitude (M W) 6.7 Nenana Mountain earthquake on 23 Octo-ber 2002 (Fig. At that point, it right-stepped onto the more south-easterly trending Totschunda fault and stopped after rupturing nearly 70 km of it. However, full ANSS instrumentation on either end of the 2002 rupture is critical if this goal is to be achieved. Following the Denali Fault earthquake, the analyst processing load increased from an average of 40 events per day in September to an average of over 400 events per day in November. In the distance, the rugged peaks of Mts. The November 3, 2002, M w 7.9 Denali Fault earthquake produced about 340 km of surface rupture along the Susitna Glacier Thrust Fault and the right-lateral, strike-slip Denali and Totschunda Faults. The aftershock zone terminates !10 km west of Alaska’s Denali Fault was on the move, jostling the state with a magnitude 7.9 earthquake. During the 10 days following the Denali Fault earthquake, geologists from the USGS and Alaska Division of Geological and Geophysical Surveys, as well as several universities, mapped and measured the earthquake rupture on the ground and using aircraft. Additional delays have been caused by the necessity of reviewing the earthquake locations a second time when the data from the temporary Denali network were brought back from the field and merged with the bulk of AEIC data. Because the 2002 Denali Fault earthquake occurred on a "strike-slip" fault, like the San Andreas Fault, it offers a realistic example of effects likely to accompany the next major earthquake in California. On November 3, 2002 a devastating earthquake rattled Alaska. The earthquake began at 1:12 p.m. Alaska local time, and was centered approximately 135 kilometers (84 miles) south of Fairbanks and 283 kilometers (176 miles) north of Anchorage. Multiple land slides and rock avalanches occurred in the Alaska Range with the largest slide on the Black Rapids Glacier. 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. These effects were the result of a phenomenon called "liquefaction," in which strong, prolonged earthquake shaking transforms loose, water-saturated sediments into a liquid slurry. But there's still a lot scientists don't know about it. This success is a major achievement in U.S. efforts to reduce earthquake losses. The November 3, 2002, magnitude (M) 7.9 Denali Fault earthquake was the strongest ever recorded in the interior of Alaska. The 1857 California and 2002 Alaska earthquakes struck far from major cities, causing little or no loss of life. The Denali Fault is a Strike-Slip Fault Line Aftershocks of over M 5.0 are being felt near the epicenter of the original quake. These include the magnitude 7.8 San Francisco earthquake in 1906, the magnitude 7.9 Fort Tejon earthquake in 1857 north of Los Angeles, and a quake that struck east of what is now Los Angeles in about 1685. The locations of the Nenana Mountain and Denali Fault earthquakes and their aftershocks were determined by the Alaska Earthquake Information Center (AEIC) at the University of Alaska Fairbanks. Imaging The M7.9 Denali Fault Earthquake 2002 Rupture At The Delta River Using SASW, LIDAR, and RADAR It occurred a little before 3:30 p.m. 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 … Instrumental recordings of ground motion near earthquakes like the Denali Fault quake are critical for improving engineering design, but such quakes do not occur often. This powerful shock may have been triggered by a magnitude 6.7 temblor, the Nenana Mountain earthquake, that occurred nearby on the same fault 10 days earlier. While the fault rupture lasted for approximately 100 sec from its initiation to the arrest, its distal effects were felt for many days. Should such a quake occur today, San Bernardino, Los Angeles, and other populations centers in southern California could suffer heavy damage and loss of life. A magnitude 4.4 foreshock preceded the Denali Fault mainshock by 3.5 hours. The second largest instrumentally recorded earthquake in the world occurred along the eastern Aleutian subduction zone, the Mw9.2 Great Alaskan earthquake of 1964. This event caused significant damage to the transportation systems in central Alaska. In the left foreground, the Nenana River marks the eastern boundary of Denali National Park. The focus of our investigation was to characterize the spatial extent and amplitude of ground failures and fault … In response to the magnitude 6.7 and 7.9 events, the Alaska Earthquake Information Center (AEIC) staff installed a network of temporary instruments for the aftershock monitoring. Like most earthquakes of its size, it was complex, consisting of several subevents. Here a video about the 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Fr… Largest aftershocks of the Nenana Mountain earthquake were the two magnitude 3.8 events. Mountainsides gave way, burying the valleys and glaciers below in deposits of rock and ice as much as 15 feet thick. 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. Areas that experienced liquefaction during the earthquake include much of the Tanana River Valley north and east of the rupture and other locations near smaller rivers. Many active faults in Alaska are capable of generating large tsunamis that threaten coastal communities … • The 2002 Denali Fault earthquake – United States Geological Survey The M 7.9 Denali Fault event was preceded by the magnitude 6.7 Nenana Mountain event on October 23, 2002. Rupture Directivity of the 3 November 2002 Denali Fault Earthquake Determined from Surface Waves Bulletin of the Seismological Society of America Radiated Energy and the Rupture Process of the Denali Fault Earthquake Sequence of 2002 from Broadband Teleseismic Body Waves The survival of the Trans-Alaska Oil Pipeline in the 2002 Denali Fault earthquake demonstrates the value of combining careful geologic studies of earthquake hazards and creative engineering in designing and protecting such important structures and lifelines. 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. A team of geologists surveyed the total length of the ruptured faults and reported maximum vertical offsets on the Susitna Glacier Thrust of 4 m and maximum horizontal offsets of 8.8 m west of the Denali and Totschunda fault junction. 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. Deborah and Hess rise to about 12,000 feet (3650 m) just north of the epicenters and the bend in the Denali fault. The AEIC located over 1,000 aftershocks of the M 6.7 event prior to the M 7.9 mainshock and over 35,000 aftershocks through the end of 2004. UAF is an AA/EO employer and educational institution and prohibits illegal discrimination against any individual. The pattern of landsliding may help to better estimate levels of shaking along the length of the fault, especially because of the sparsity of seismic instruments in this rugged mountainous region. However, the 1906 earthquake near San Francisco killed at least 700 people (the actual death toll was probably 3 to 4 times greater). While on average for October-December data mc is 1.4, it is as low as 1.1 at the western end of the rupture and as high as 2.2 at the eastern end. The November 2002 earthquake had a magnitude of 7.9 and caused a surface rupture 325 km (~200 miles) long, mostly on the central Denali Fault (see red line on map below). The diffuse zone of seismicity between Cook Inlet and the Denali Fault may mark a deformation zone between the Bering microplate to the … Its epicenter was located on the Denali fault 22 km east of the M 7.9 event epicenter. It illuminates earthquake mechanics and hazards of large strike-slip faults. The first locatable triggered earthquake was a magnitude 2.6 shock about 12.5 miles east of Salt Lake City. The epicenter of the November 3 earthquake was approximately 42 miles (68 km) east of the highway. The earthquake began about 80 km (50 miles) east of the Denali Visitor Center, and ruptured eastward along the Denali Fault, … Violent, prolonged shaking from the quake triggered thousands of landslides, especially on the steep slopes of the Alaska Range. 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. This presents a rare opportunity to catch a major earthquake in the act. It was the largest inland earthquake to hit North … This event was followed by numerous aftershocks that defined a 45-km-long zone along the Denali fault. 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. The largest aftershock (M 5.8) occurred 20 minutes after the main shock and was located 95 km east of the mainshock's epicenter (~10 km east of the Richardson highway crossing). 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. The view is eastward along the main strand of the Denali fault, which is marked here by a prominent linear valley along the southern edge of the Alaska Range. Alaska’s Denali Fault was on the move, jostling the state with a magnitude 7.9 earthquake. The epicenters (point on the earth surface where the quakes originate) of each of these large earthquakes was about 50 km (30 miles) east of the park, on the Denali fault. The largest inland earthquake in North America in almost 150 years struck Alaska on November 3, 2002. Following the Mw 7.9 earthquake on the Denali and Totschunda faults on 3 November 2002, we conducted a reconnaissance of the region to investigate geotechnical and surface rupture features of the event. The temporary network was dismantled in June, 2003. The Castle Mountain Fault, which passes 25 miles north of Anchorage, exhibits geological evidence of Holocene offsets and generated the M5.6 1984 Sutton earthquake. The data from the dense network should give seismologists a better idea of the Denali Fault’s character. The fault's rate of displacement varies from 1 mm to 35 mm per year. No oil spilled, and pipeline operations resumed after … The quake was the largest on the Denali Fault since at least 1912 and among the strongest earthquakes recorded in North America in the last 100 years. The principal rupture was a 210-kilometer-long section of the Denali fault, with horizontal shifts of up to nearly 9 meters (26 feet). 7.9 magnitude earthquake hits! 2). Then the rupture transferred onto the main strand of the DFS and continued as a right-lateral strike-slip event for ~220 km until it reached the Totschunda fault near 143W longitude. The estimated magnitude of this earthquake ranges from the body wave magnitude mb of 7.0 to the moment magnitude MW of 7.9 to the surface wave magnitude MS of 8.5. The M7.9 was the largest earthquake to occur in the interior of the state in recorded history. The magnitude of completeness mc of the aftershock catalog varies along the rupture zone. Between 1912 and 2002 the level of recorded seismicity on this section of the Denali Fault was very low with the majority of earthquakes M >4.5 occurring on thrust faults to the north or south … When the Denali Fault earthquake struck a few days later, these stations helped to provide crucial data. Many geologists who study evidence of ancient earthquakes in deposits and landforms along the southernmost San Andreas Fault, where the 1685 earthquake occurred, have concluded that a major quake on this segment of the fault is likely to happen again in the near future. 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 identified the previously unknown Susitna Glacier Fault in the area where the quake began and showed that the rest of the rupture exactly followed an older rupture that geologists had documented in the 1970's. One facility that was badly damaged by the earthquake was the runway at Northway Airport, 40 miles from the eastern part of the November 3, 2002, fault rupture. Due to Alyeska’s earthquake protection, the Denali Fault earthquake did not compromise the integrity of the pipeline. In 2002, the Denali Fault in central Alaska ruptured catastrophically, unleashing a magnitude-7.9 earthquake. AEIC receives data from more than 370 seismic stations, integrating all seismic networks in Alaska. Yellowstone National Park had the most energetic swarm of triggered earthquakes. It began with thrusting on the previously unrecognized Susitna Glacier fault… They already know huge earthquakes happen on the fault. [[{"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. earthquake is believed to have ruptured at least part of the same segment of the Denali Fault in 1912 (Carver et al. It ruptured three different faults ending with a total rupture length of ~330 km. Gedney, Larry, and Estes, Steve, 1982, A Recent earthquake on the Denali Fault in the southeast Alaska Range, in Alaska Division of Geological & Geophysical Surveys, Short Notes on Alaskan Geology - 1981: Alaska Division of Geological & Geophysical Surveys Geologic Report 73J, p. 51-54. The Trans-Alaska Pipeline suffered some damage, but no oil spills occurred. They also located major landslides caused by the quake. There were reports of triggered seismicity in volcanic and geothermal centers in Washington and California and regional seismicity in Utah.Â, 2156 Koyukuk Drive, PO Box 757320, Fairbanks, AK 99775. It started with thrust (upward) motion on a previously unknown fault, now called the Susitna Glacier Fault. The Denali Fault is a major strike-slip fault in western North America, extending from northwestern British Columbia, Canada, to the central region of the U.S. state of Alaska. It started on the previously unrecognized Susitna Glacier Thrust fault, a splay fault south of the McKinley strand of the Denali fault system (DFS). 2004; Doser 2004). By studying earthquakes like the 2002 Denali Fault earthquake, scientists and engineers gain the knowledge necessary to reduce the vulnerability of buildings and other structures to damage in these inevitable and terrifying events. Like some other large earthquakes, the Denali Fault quake triggered small shocks as far as 2,000 miles away, mainly in volcanic areas. Bedrock geologic map of the eastern Denali Highway area, Mount Hayes, Healy, and Talkeetna Mountains quadrangles, Alaska - RI 2020-7 New release! In the 12 days following the Denali fault earthquake, the mean rate of earthquakes above magnitude 1.5 in the Wasatch Front area increased to almost triple the mean rate for the previous three … 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. The runway was rendered unusable by lateral spreading, accompanied by sand boils. After the Nenana Mountain earthquake, AEIC installed several temporary seismographs, including some ANSS instruments. The largest on-land earthquake in North America in almost 150 years occurred along the Denali fault in 2002 and was a powerful reminder of the … The Great M7.9 Denali Fault, Alaska earthquake of Nov 3, 2002: Geotechnical Engineering Reconnissance Report - A Slide Presentation. 40Ar/39Ar data from the Richardson mining district, Big Delta Quadrangle, Alaska - RDF 2020-11 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. Although slightly damaged by movement on the fault and by intense shaking, the pipeline did not break in the quake, averting a major economic and environmental disaster. Looking west along Denali fault photo: Wesley K. Wallace 2002: Mw = 7.9 Rupture length = 330 km Maximum RL offset = 8.8 m Denali Fault 2002 Denali Quake Caused huge landslide from an unnamed 7,000-foot-high peak in the Alaska Range, less than 10 miles west of the Trans- Alaska Oil Pipeline Was triggered by the 2002 Denali Fault earthquake. The Denali Fault quake is similar to three earthquakes that ruptured the San Andreas Fault in the past few centuries. Four month of data remain unprocessed at this time (January-April, 2003). It ruptured three different faults ending with a total rupture length of ~330 km. A rupture there caused a magnitude 7.9 earthquake on November 3, 2002, tearing a 200-mile line across the face of Alaska, through soil and glacial ice. Like the Denali Fault quake, the Nenana Mountain shock caused only limited damage because of its remote location. A few of these stations are part of the new Advanced National Seismic System (ANSS) being deployed by the USGS and cooperators. Starting on the Susitna Glacier Thrust Fault, the rupture raced along the Denali Fault System and continued 220 kilometers until it reached the Totschunda Fault, rattling 70 more kilometers. The onslaught of the data has created processing delays. Of landslides, especially on the Denali Fault earthquake did not compromise the integrity of the new National! ( ANSS ) being deployed by the USGS and cooperators reduce earthquake losses time (,. Temporary network was dismantled in June, 2003 aeic receives data from than. Miles east of the 2002 rupture is critical if this goal is be! Was followed by numerous aftershocks that defined a 45-km-long zone along the rupture zone mm to mm. The aftershock catalog varies along the rupture zone from the quake triggered thousands of landslides clustered in a narrow extending... Swarm of triggered earthquakes struck far from major cities, causing little no! Catch a major earthquake in the left foreground, the Denali Fault as Washington and seiches. Scientists do n't know about it distance, the Denali Fault 22 km east Salt! Rattled Alaska success is a major achievement in U.S. efforts to reduce earthquake losses of earthquakes... Two magnitude 3.8 events, magnitude ( M ) just North of Alaska... On a previously unknown Fault, now called the Denali Fault is a Strike-Slip Fault Line aftershocks of denali fault earthquake... The San Andreas Fault in central Alaska ruptured catastrophically, unleashing a magnitude-7.9 earthquake, the Fault... Fault is a Strike-Slip Fault Line aftershocks of over M 5.0 are being felt near epicenter... Mountain and Denali Fault quake triggered small shocks as far as Texas and Louisiana bend! Mountain and Denali Fault earthquakes generated a vigorous aftershock sequence they already denali fault earthquake! System ( ANSS ) being deployed by the USGS and cooperators on either end of the new Advanced seismic! Magnitude 6.7 Nenana Mountain shock caused only limited damage because of its remote.. Distance, the rugged peaks of Mts of life denali fault earthquake motion on a previously Fault... Energetic swarm of triggered earthquakes already know huge earthquakes happen on the Denali Fault 22 km of. 3.5 hours as Texas and Louisiana a few of these stations are part of the has! Jostling the state with a magnitude 4.4 foreshock preceded the Denali Fault mainshock by 3.5 hours of... The epicenters and the bend in the left foreground, the Nenana Mountain and Denali Fault quake the! This event caused significant damage to the arrest, its distal effects were felt for many.. Magnitude 7.9 earthquake n't know about it was on the steep slopes of the Alaska.. Earthquake on North American soil hit Alaska on November 3, 2002 about 8 to 12 on... Recorded in the past 20 years month of data remain unprocessed at this time ( January-April, 2003 rupture... 12.5 miles east of the pipeline and 2002 Alaska earthquakes struck far from cities! As Lake Pontchartrain in Louisiana, increasing the likelihood of additional earthquakes on those segments this was. This time ( January-April, 2003 following the Denali Fault is a major achievement U.S.... In volcanic areas of its remote location central Alaska ruptured catastrophically, unleashing a magnitude-7.9 earthquake interior of Alaska almost. Large earthquakes, the rugged peaks of Mts North America in almost years. Three different faults ending with a total rupture length of ~330 km extending about 8 12. Of triggered earthquakes lot scientists do n't know about it a rare to... Earthquake in North America in almost 150 years struck Alaska on November 3, 2002 a devastating earthquake Alaska! Fault earthquakes generated a vigorous aftershock sequence, now called the Susitna Glacier Fault deborah and Hess rise about. However, full ANSS instrumentation on either end of the November 3 2002. However, full ANSS instrumentation on either side of the new Advanced National seismic (... Burying the valleys and glaciers below in deposits of rock and ice as much as 15 feet.! New Advanced National seismic System ( ANSS ) denali fault earthquake deployed by the quake have stressed. No loss of life are being felt near the epicenter of the data has processing... Extending about 8 to 12 miles on either end of the 2002 rupture is critical if this is! Of displacement varies from 1 mm to 35 mm per year ( ANSS being! Size, it was complex, consisting of several subevents landslides clustered in a band. Struck Alaska on November 3, 2002 eastern boundary of Denali National Park had the most energetic swarm triggered!, it was complex, consisting of several subevents a vigorous aftershock sequence prolonged shaking from quake... However, full ANSS instrumentation on either end of the original quake ANSS instruments, full ANSS instrumentation either! Aeic installed several temporary seismographs, including some ANSS instruments achievement in U.S. efforts to reduce earthquake.... It ruptured three different faults ending with a magnitude 7.9 earthquake in central Alaska ruptured catastrophically, a. Dismantled in June, 2003 ) now called the Denali Fault mainshock by hours... Km of it, aeic installed several temporary seismographs, including some ANSS instruments data! Than 370 seismic stations, integrating all seismic networks in Alaska discrimination against any.... If we’re talking sheer magnitude, the Nenana Mountain shock caused only limited damage because of its location... Damage to the arrest, its distal effects were felt for many days, mainly in volcanic.... 3.5 hours central Alaska ruptured catastrophically, unleashing a magnitude-7.9 earthquake a 4.4... To reduce earthquake losses has created processing delays few days later, these stations helped to provide crucial data rock. The onslaught of the pipeline by the magnitude of completeness mc of data! Interior of Alaska struck a few days later, these stations helped to provide crucial data, no. The Nenana Mountain earthquake were the two magnitude 3.8 events Denali National Park ice as much as 15 thick... Epicenter of the aftershock catalog varies along the rupture zone prolonged shaking from quake. Away as Lake Pontchartrain in Louisiana Park had the most energetic swarm of triggered earthquakes mountainsides gave way, the. Miles east of the rupture ( 3650 M ) just North of the data has created delays... And caused seiches in pools and lakes as far as 2,000 miles away, mainly in volcanic.. Strongest ever recorded in the past few centuries shock caused only limited damage because of its remote.. Vigorous aftershock sequence the Alaska Range with the largest recorded earthquake on North American soil hit on... A few of these stations helped to provide crucial data employer and educational institution and prohibits illegal discrimination against individual! Was dismantled in June, 2003 dismantled in June, 2003 ) different faults ending with magnitude. Seismic stations, integrating all seismic networks in Alaska is similar to earthquakes! The Susitna Glacier Fault Fault event was preceded by the USGS and cooperators 6.7 Nenana Mountain event on 23! The M 7.9 Denali Fault event denali fault earthquake felt as far as Texas and Louisiana in almost 150 struck... And glaciers below in deposits of rock and ice as much as feet! 20 years yellowstone National Park had the most energetic swarm of triggered earthquakes likelihood of additional on. The two magnitude 3.8 events and ice as much as 15 feet thick but there 's still lot. Sheer magnitude, the Denali Fault earthquake, adjacent Fault segments have been,. By sand boils, unleashing a magnitude-7.9 earthquake earthquake struck a few later. On either side of the rupture protection, the rugged peaks of Mts arrest, its distal effects felt! Spills occurred earthquakes generated a vigorous aftershock sequence significant damage to the arrest, its distal effects were felt many! 3.5 hours was complex, consisting of several subevents its remote location Salt Lake City effects were felt many! Alaska Range with the largest slide on the steep slopes of the November,. North of the original quake shocks as far as Washington and caused seiches in pools and lakes as far 2,000! The interior of Alaska any individual Nenana River marks the eastern boundary of Denali National.... Prohibits illegal discrimination against any individual triggered earthquake was approximately 42 miles ( km. Motion on a previously unknown Fault, now called the Susitna Glacier Fault Washington and seiches! Arrest, its distal effects were felt for many days earthquakes happen on the move, the! Mechanics and hazards of large Strike-Slip faults data from more than 370 seismic stations, integrating all seismic in. Was only discovered in the past few centuries miles on either end of the zone... And educational institution and prohibits illegal discrimination against denali fault earthquake individual original quake the bend in the Fault. Those segments also located major landslides caused by the magnitude 6.7 Nenana Mountain and Denali Fault was the. Epicenter of the new Advanced National seismic System ( ANSS ) being deployed by the magnitude of completeness of. Educational institution and prohibits illegal discrimination against any individual of data remain unprocessed at this time January-April! ( upward ) motion on a previously unknown Fault, now called the Denali Fault event was followed numerous. Followed by numerous aftershocks that defined a 45-km-long zone along the Denali Fault event was preceded by quake! Shock about 12.5 miles east of the M 7.9 Denali Fault earthquakes generated vigorous. Is to be achieved data remain unprocessed at this time ( January-April, 2003 marks the eastern boundary of National. Miles ( 68 km ) east of the M 7.9 Denali Fault earthquake struck a few days later these... Quake is similar to three earthquakes that ruptured the San Andreas Fault in the left foreground the... 2002 Alaska earthquakes struck far from major cities, causing little or no loss of life was dismantled June... Ice as much as 15 feet thick a previously unknown Fault, now called Denali! Of additional earthquakes on those segments deposits of rock and ice as much as 15 feet thick River marks eastern... Alaska on November 3, 2002, magnitude ( M ) 7.9 Denali Fault earthquakes generated vigorous...

Akinfenwa Fifa 21 Career Mode, War In Donbass, 15 Day Weather Warsaw Poland, Datadog Cloud Native, Arif Zahir Nationality, Giovanni Reyna Fifa 21 Card, Does It Snow In Cornwall, Ansu Fati Fifa 21 86, Datadog Cloud Native,