[4] Due to the remote location, there were no fatalities and only a few injuries. 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. It ruptured three different faults ending with a total rupture length of ~330 km. On November 3, 2002 a devastating earthquake rattled Alaska. At that point, it right-stepped onto the more south-easterly trending Totschunda fault and stopped after rupturing nearly 70 km of it. This event caused significant damage to the transportation systems in central Alaska. While the fault rupture lasted for approximately 100 sec from its initiation to the arrest, its distal effects were felt for many days. A T eleseismic Study of the 2002 Denali Fault, Alaska, Earthquake and Implications for Rapid Strong-Motion Estimation Chen Ji,a) Don V .Helmber ger,a) and Da vid J.W ald, b) M.EERI Slip histories for the 2002 M7.9 Denali fault, Alaska, ear thquak e are de- The shock was the strongest ever recorded in the interior of Alaska. Minor damage was reported over a wide area but the only examples of severe damage were on highways that crossed the fault trace and areas that suffered liquefaction, e.g. Denali’s Fault. EERI Special Earthquake Report — February 2003 Learning from Earthquakes Preliminary Observations on the November 3, 2002 Denali Fault, Alaska, Earthquake This report is based on data collect- ed after the earthquake by a num-ber of teams and individuals, and compiled by John Aho of CH2M Hill in Anchorage, Alaska. The 2002 Denali Fault earthquake (Mw = 7.9) is the largest strike-slip earthquake in North America in more than 150 years. There is evidence of local supershear propagation inferred from ground motions.[8]. This event was followed by numerous aftershocks that defined a 45km-long zone along the Denali fault. The 2003 Rat Islands earthquake in Alaska had a Richter scale magnitude of 7.8. The onslaught of the data has created processing delays. 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. 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. Due to the remote location, there were no fatalities and only a few injuries. This was the footage that was seen all-over the world! Measuring 7.9 in magnitude, the earthquake caused ground to shift beneath the pipeline 14 feet horizontally and 2.5 feet vertically. Total length of the rupture was at least 300 km (190 miles). Here, we use GPS observations of postseismic deformation following the 2002, M7.9 Denali, Alaska earthquake to directly infer the viscous strength of the upper mantle, finding a rheology consistent with a laboratory-derived, stress-dependent, power-law for hot, wet olivine. It ruptured three different faults ending with a total rupture length of ~330 km. THE TRANS-ALASKA OIL PIPELINE SURVIVES THE QUAKE—A TRIUMPH OF SCIENCE AND ENGINEERING One matter of great concern immediately following the magnitude 7.9 Denali Fault earthquake in November 2002 was the fate of the Trans-Alaska Oil Pipeline, built in the 1970's. 2). The 2002 Denali earthquake occurred at 22:12:41 UTC (1:12 PM Local Time) November 3 with an epicenter 66 km ESE of Denali National Park, Alaska, United States. There were reports of triggered seismicity in volcanic and geothermal centers in Washington and California and regional seismicity in Utah. The Denali Fault event was felt as far as Washington and caused seiches in pools and lakes as far as Texas and Louisiana. October 2002 Nenana Mountain earthquake and the 3 November 2002 Denali earthquake by satellite radar imagery. It illuminates earthquake mechanics and hazards of large strike-slip faults. These people tend to get water from private wells, heat their homes and cook their meals with gas furnaces and stoves, and maintain individual septic systems.[9]. 1). In the left foreground, the Nenana River marks the eastern boundary of Denali National Park. In Alaska, moving from east to west, the plate interactions change from a transform boundary between Pacific and North American plates to a collision zone with a microplate, the Yakutat terrane, which is in the process of being accreted to the North American plate, to a destructive boundary along the line of the Aleutian islands. the 2002 Denali Fault Earthquake Eric M. Dunham and Ralph J. Archuleta To appear in BSSA Abstract Elastodynamic considerations suggest that the acceleration of ruptures to supershear velocities is accompanied by the release of Rayleigh waves along the fault from the stress breakdown zone. There was no oil spillage, as the pipeline at that location was designed to move laterally along beams to withstand major movement on the Denali Fault. Areas affected by liquefaction are largely confined to Holocene alluvial deposits, man-made embankments, and backfills. A magnitude 4.4 foreshock preceded the Denali Fault mainshock by 3.5 hours. The Nenana Mountain and Denali Fault earthquakes generated a vigorous aftershock sequence. 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. BRAINLIESTTT ASAP! The largest inland earthquake in North America in almost 150 years struck Alaska on November 3, 2002. On November 3, 2002, the Denali Fault ruptured over a distance of 336 km, producing the largest earthquake from a continental strike-slip fault in North America since the 1906 San Francisco earthquake. It started on the previously unrecognized Susitna Glacier Thrust fault, a splay fault south of the McKinley strand of the Denali fault system (DFS). Water in pools, ponds, and bayous as far away as Texas and Louisiana splashed for nearly half an hour. The shaded-relief image above shows the location of the earthquake, which occurred on the Denali fault alongside the Alaska Range. These seiches were likely initiated during the large amplitude seismic surface waves from this earthquake. Macroseismic data for the 2002 Nov 3 Denali, Alaska, earthquake were were obtained from three sources: (1) the Did You Feel It? It started on the previously unrecognized Susitna Glacier Thrust fault, a splay fault south of … During the afternoon of November 3, 2002, the water in Seattle’s Lake Union suddenly began sloshing hard enough to knock houseboats off their moorings. "Fact Sheet 014-03: Rupture in South-Central Alaska—The Denali Fault Earthquake of 2002", "Evidence for a Supershear Transient during the 2002 Denali Fault Earthquake", Effect of the Denali Fault Rupture on the Trans-Alaska Pipeline, M 7.9 Denali Fault earthquake of November 3, 2002, https://en.wikipedia.org/w/index.php?title=2002_Denali_earthquake&oldid=1011526211, 2002 natural disasters in the United States, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 March 2021, at 10:35. Northway Airport. Coincident with the arrival of the seismic waves in Utah around 3:28 p.m., the University of Utah’s regional seismic network detected a marked increase in earthquake activity along the Intermountain seismic belt in Utah. Fortunately, no one was seriously injured, due to the small population located within 30 miles either side of the fault. The earthquake struck at 1:12 p.m. (5:12 p.m. Because of its location close to the November 3 event and the fact that it preceded it by only 11 days, this earthquake is regarded as a foreshock that probably directly triggered the main shock. This Synthetic Aperture Radar (SAR) interferogram includes the epicenters of the October 23, 2002, and November 3, 2002 Denali Fault earthquakes, which are located at the extreme western end of the fault rupture. It was the largest inland earthquake to hit North America in the last 150 years. UAF is an AA/EO employer and educational institution and prohibits illegal discrimination against any individual. Its epicenter was located on the Denali fault 22 km east of the M 7.9 event epicenter. [10] The pipeline was shut down for three days to allow for inspections but was then reopened. [5] About 20 houseboats were damaged by a seiche on a lake in Washington State.[5]. The shock was the strongest ever recorded in the interior of Alaska. 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