On the morning of November 3, 2003 an earthquake of moment magnitude M 7.9 ruptured across three faults: the Susitna Glacier, Denali, and Totschunda. Denali, highest peak in North America. Abstract . Power, M.A., 1988. (a) Location of Denali fault rupture (thick lines) and simulation region (dashed lines) (shown in b). Its total length is 1,700 km, and about 1,140 km of the fault has evidence for Quaternary move-ment (figure 3). It is located near the centre of the Alaska Range, with two summits rising above the Denali Fault, in south-central Alaska, U.S. Fairbanks Air Quality and PM2.5, Frosty Feathers: Avian Tales of Winter Survival, Out of the Blues: Beating Seasonal Affective Disorder, Volcano Detectives: Locating, Predicting and Avoiding Ash Clouds. The recent activity of the Denali fault system was demonstrated by the 2002 M7.9 Denali fault earthquake sequence (Eberhart-Phillips et al., 2003), which ruptured three intersecting faults of this system by initiating on the Susitna Glacier fault, stepping onto and rupturing 226 km of the Denali fault, and then transferring onto the Totschunda fault (Fig. rupture location was fixed to that of the mapped fault trace,and it is assumed that the fault is vertical with pure right-lateral slip.Slip on two segments were solved.The first of these is 55 km long and extends from the western end of the strike-slip rupture on the Denali Fault to the location where the strike of the fault The fault is curved just North of the mountain of Denali. - YouTube. The Denali and Totschunda Faults are located along the northeastern edge of the Wrangell Subplate. The shock was the strongest ever recorded in the interior of Alaska. Running right by Denali, the Denali Fault triggers around 600 earthquakes a year within the park that are at least a magnitude 1. “Denali’s Fault.” NASA: Earth Observatory. By deÞ-nition, the latter is the position w here rupture initiates and the for mer is the centroid of T ab le 1. It is located near the centre of the Alaska Range, with two summits rising above the Denali Fault, in south-central Alaska, U.S. Denali’s official elevation figure of 20,310 feet (6,190 metres), established by the United States Geological Survey in September Location: Online Sean Regan will present “Tectonic Social Distancing Along the Denali Fault” at 7 p.m. Tuesday, Feb. 23, as part of the the University of Alaska Fairbanks Geophysical Institute’s virtual 2021 Science for Alaska Lecture Series. Eastern Denali Fault Surface Trace Map, Eastern Alaska and Yukon, Canada By Adrian M. Bender and Peter J. Haeussler . Change ), You are commenting using your Google account. Convection currents in the Earth’s molten mantle move the plates of the crust. “Earthquake and Seismic Monitoring in Denali (U.S. National Park Service).” National Parks Service. It caused offsets and cracks in the ground over 20 feet wide in some locations. While not a volcano, volcanic processes have developed Denali. Beyond the branching location there was no surface rupture visible on the Denali fault for at least 25 km [Peter Haeussler, USGS, Anchorage; private communication, 2002]. United States. Denali comprises Mount McKinley, the highest peak in North America towering 4,800 meters above the surrounding landscape as well as Denali fault system, the largest crustal break in North America. RSVP on Zoom (https://bit.ly/3iMGjd4) or watch live on the UAF or Geophysical Institute Facebook pages. Observations of surface faulting re- veal that three faults ruptured: the Denali, the Totschunda, and the pre-viously unknown Susitna Glacier fault. The University of Alaska Fairbanks is an AA/EO employer and educational institution and prohibits illegal discrimination against any individual: Learn more about UA's notice of nondiscrimination. This National Park includes part of a massive mountain range more than 600 miles long. Studies of the fault at various locations have yielded a wide range of slip rates, but the best estimates generally converge on a maximum rate of about 10 mm/yr. The Denali Fault is a major intracontinental dextral (right lateral) strike-slip fault in western North America, extending from northwestern British Columbia, Canada to the central region of the U.S. state of Alaska.. (b) 2002 Denali Earthquake Sequence showing location of M6.7 Nenana Mountain Earthquake and M7.9 Denali Fault Earthquake and This collision creates mountain uplift of the Alaska Range. Figure 3: This map shows the location of the Denali Fault and its curved shape. The 3 November 2002 Denali fault earthquake was a complex M w 7.9 event with rupture beginning on the Susitna Glacier thrust fault, continuing onto the Denali strike-slip fault, and terminating on the Totschunda strike-slip fault (Eberhart-Phillips et al., 2003). Since it was established by an Act of Congress in 1946, scientists at the Geophysical Institute have studied geophysical processes from the center of the Earth to the surface of the sun and beyond, turning data and observations into information useful for state, Arctic and national priorities. The Denali Fault is a long, tectonically active region that snakes through Alaska’s southern interior. Analysis of the Along the Denali Fault, lateral and vertical offset movement is taking place. Location. The Denali Fault event was felt as far as Washington and caused seiches in pools and lakes as far as Texas and Louisiana. The largest earthquake ever recorded on the Denali fault system (magnitude 7.9) struck central Alaska on November 3, 2002. On the basis of earthquake focal mechanisms, the state of stress along the central Denali fault, Alaska system changed after the 2002 earthquake sequence. This National Park includes part of a massive mountain range more than 600 miles long. Will defrosting the "icebox" lead to more summer wildfires in Alaska? Slate Creek paleoseismic trench sites and Boulder Moraine offset site are labeled with black stars on the west and east sides of This National Park includes part of a massive mountain range more than 600 miles long. The Denali Fault is part of a complex zone of con-tinental deformation between the Aleutian megathrust and the Queen Char-lotte Transform. The last segment of rupture was along the Totschunda fault, which branches off from the Denali fault, with 68 km of observed surface rupture (Peter Haeussler, U.S. Geological Survey [USGS], Anchorage; per- The Denali and Totschunda Faults are located along the northeastern edge of the Wrangell Subplate. Two end-member tectonic models can be invoked to explain the intracontinental deformation of southern Alaska and the growth of the Alaska Range. The Denali fault, an active continental-scale strike-slip fault, has an asymmetric topographic signature (the Alaska Range), making the region an ideal location to examine the contribution of local and regional structures on strain partitioning and the timing of exhumation adjacent to the fault. Web. Dr. Casey D. Allen, Associate Professor, Department of Geography & Environmental Sciences University of Colorado Denver: Geographic concepts and understanding were taken from lectures on building Earth’s landscapes in his Introduction to Physical Geography class. Land south of the faults moves to the west relative to the north at a rate of about 1 centimeter per year. The location of the Denali fault seems therefore to be a function of two main parameters: Preexisting weakness and structural inheritance due to terranes with contrasting strength profiles. Alaska is the most geologically active part of the United States. The Denali earthquake also triggered tremor along the San Andreas Fault in California, while the 2010 Maule (Chile) earthquake triggered a slow slip event in Guerrero, Mexico (Zigone et al., 2012 Create a free website or blog at WordPress.com. By defi-nition, the latter is the position where rupture initiates and the former is the centroid of Table 1. In 2002, the M 7.9 earthquake ruptured a portion of the Denali fault east of the park to produce a horizontal offset of up to 8.8 m (29 feet). Thus, the complex interaction of plate subduction, faults, and volcanic processes continues to produce the landscape of Denali, as well as shape the lives of the people living in the area. It illuminates earthquake mechanics and hazards of large strike-slip faults. Edit them in the Widget section of the, https://www.nps.gov/articles/aps-v5-i1-c6.htm, https://www.nps.gov/dena/learn/nature/earthquakes.htm, http://earthobservatory.nasa.gov/Features/denali/, http://creativecommons.org/licenses/by-sa/2.0, https://commons.wikimedia.org/wiki/File%3AMount_McKinley_Alaska.jpg, Climatic, Atmospheric, and Temperature Conditions of Denali. , Article-2, United States 170 degrees Sensor Replacement: 2005 GM XL... Of the epicenter of the Wrangell Subplate is a long, tectonically active region that through! 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