Thick vegetation, along with complex glacial landforms, large braided rivers, and fault-parallel bedrock structure (e.g., bedding) obscure the Eastern Denali Fault's surface expression. Remember that pure strike-slip movement would follow a small circle path. | Geologic (mfd). Along the Denali Fault, lateral and vertical offset movement is taking place. Many tribes even left the region permanently. Note the striking contrast in rock type and age on opposite sides of the fault. This National Park includes part of a massive mountain range more than 600 miles long. FOIA The Denali and Totschunda Faults are located along the northeastern edge of the Wrangell Subplate. This National Park includes part of a massive mountain range more than 600 miles long. Also, the details of the mechanics of uplift are of interest. The Denali Fault is located in Alaska's Denali National Park and to the east. Early-stage exploration for geothermal energy resources along the Denali fault near Duke River, Yukon. [Adrian M Bender; Peter J Haeussler; Geological Survey (U.S.),] Credit: compiled by K. Ridgeway, Purdue University. Areas affected by liquefaction are largely confined to Holocene alluvial deposits, man-made embankments, and backfills. Mapping the bedrock geology along the 1,000-mile-long Denali fault revealed information on past movement on the fault and the likely direction of motion on the fault in future earthquakes. Division | Alaska Science Center PASADENA, Calif.- Geologists just back from a reconnaissance of the 7.9-magnitude Alaska earthquake of November 3 confirm that rupture of the Denali fault was the principal cause of the quake. The Denali Fault and Earthquakes. Rupture of Denali fault responsible for magnitude 7.9 Alaskan earthquake of November 3. Image taken from http://earthobservatory.nasa.gov/Study/denali/ . Witter, J.B., 2020. The rupture of the snow provided a detailed, shall we3 say, striking, picture of the rupture trace. Detailed Description At pass west of Delta River. Note the push up in the background. Eastern Denali Fault surface trace map, eastern Alaska and Yukon, Canada. 0.4 m slip on the Susitna Glacier fault, between 1 and 9.5 km depth on a 29 km long fault that dips north at 41 0.7 and has a surface projection close to the mapped rupture. Because earthquakes tend to recur along faults, an earthquake that relieves stress on one part of a fault may actually increase stress on other parts of a fault system. By the time Lewis and Clark arrived on the West Coast in 1805, it had been 105 years since the Cascadia Subduction Zone last ruptured, sending a large portion of the Pacific Ocean roaring toward the coast. Alaska Earthquake Frequency Map Alaska Offshore Subduction Fault Zone Map Alaska Earthquake Hazard Map Alaska Faults and Volcanoes Note the fairly complex fracture geometry associated with the rupture. The Denali fault is an active intraplate dextral strike-slip fault. The image is from http://pubs.usgs.gov/fs/2003/fs017-03/ . (a) Location map showing the Pacific–North American Plate boundary in Alaska. Download the text as a 13-page PDF (ds422_text.pdf; 5.9 MB), Download the map as a 36" x 19" PDF (ds422_fig3_DF_bigmap.pdf; 31.6 MB), Google® Earth files; this package consists of a folder that contains two .kml files and two .kmz files with which you can add the data from this report to your copy of Google® Earth (google_earth_files.zip; 5.3 MB compressed; 6 MB uncompressed), Readme file that contains descriptions of the digital dataset files (DFrupture_readme.txt; 56 kB), Metadata for: air photos (DFrupture_meta_DFairphotos.txt; 64 kB), kilometers (DFrupture_meta_DFkilometers.txt; 64 kB), and lines (DFrupture_meta_DFlines.txt; 72 kB), Shape files (DFrupture_shape.zip; 3.6 MB compressed; 19.6 MB uncompressed), Database (DFrupture_mdb.zip; 34.5 MB compressed; 249 MB uncompressed), Topos (DFrupture250ktopos.zip; 24.8 MB compressed; 209 MB uncompressed), gen files (DFrupture_gen.zip; 2.6 MB compressed; 11.2 MB uncompressed), For questions about the content of this report, contact Peter Haeussler. This is a USGS produced shake map, which shows the relative magnitudes of ground shaking during the 2002 earthquake. The geology near the pipeline crossing showed older rocks on the north side of the fault that are side-by-side with younger rocks on the south s… Image from http://pubs.usgs.gov/fs/2003/fs014-03/shakemap.html. 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.. The location map of the study site of Denali Fault line in southwest Yukon. Download a free copy of the current version of Adobe Reader. Previous estimates of the slip rate on the Denali Fault are variable, ranging from ≤3 to 10–20 mm yr −1 . The eastern Denali fault maintains a strike of 124° for more than 150 km to the U.S.‐Canada border. Image from and a lot more information at http://ak.water.usgs.gov/glaciology/m7.9_quake/ . http://earthobservatory.nasa.gov/Study/denali/, http://people.arsc.edu/~kcarlson/Other/EQ.html, http://ak.water.usgs.gov/glaciology/m7.9_quake/, Purdue University website on GPS research on Denali. Seventeen km of the fault trace, which broke through glacier ice, were not digitized in detail due to time constraints, and air photos missed another 10 km of fault rupture through the upper Black Rapids Glacier, so that was not mapped in detail either. USGS map of topography and earthquakes associated with Denali fault in Alaska. 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 … 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 fault is dextral. Now considered a foreshock of the larger quake, the October earthquake caused no surface ruptures. Points were digitized 4.3 m apart, on average, for the entire surface rupture. Page Last Modified: February 6, 2009 The azimuths of the eastern Denali fault and Totschunda fault, where they sub‐parallel each other east of the transfer zone, differ on average by 12 degrees. Location. URL: https://pubs.usgs.gov/ds/422/ Note the strong curvature of the topography and fault. It began with thrusting on the previously unrecognized Susitna Glacier fault, continued with right-slip … Plafker and Clague mapped the fault in Alaska and Yukon respectively, providing the basis for generalized digital maps … The few remaining Native Americans in the area spoke of the earth shaking and ocean rising to consume the land. This same earthquake offset the Alaska pipeline some 14 feet, which the pipeline was engineered and did accommodate. Alaska's major faults that include - Alaska-Aleutian Megathrust, Clark Fault, Denali Fault, Kaltag Fault, Kodiak Shelf Fault, Chugach-St. Elias Fault, Fairweather Fault, and Caribou Fault. Digital photogrammetric methods were primarily used to create a 1:500-scale, three-dimensional surface rupture map, and 1:6,000-scale aerial photographs were used for three-dimensional digitization in ESRI’s ArcMap GIS software, using Leica’s StereoAnalyst plug in. The eastern section of the Denali Fault did not rupture during the 2002 Denali Fault earthquake (Mw 7.9), however seismologic, geodetic, and geomorphic evidence along with a paleoseismic record of several past ground-rupturing earthquakes demonstrate the fault is active. In that the highest mountain in North America lies in proximity, the deformation complex has a major vertical component of motion, and the Denali fault is a transpressive feature. | PDF help We map the 385-kilometer (km) long surface trace of the right-lateral, strike-slip Denali Fault between the Totschunda-Denali Fault intersection in Alaska, United States and the village of Haines Junction, Yukon, Canada. Denali's Fault (GC10DJK) was created by Tundra-quad on 1/16/2007. Eastern Denali Fault Surface Trace Map, Eastern Alaska and Yukon, Canada By Adrian M. Bender and Peter J. Haeussler . Figure 2 (bottom): Geologic map of part of the 2002 Denali Fault rupture near the Trans-Alaska Pipeline crossing in the Alaska Range. A Page Created: February 6, 2009 However, it wasn’t until the discovery of the Cascadia Fault in the 1960s th… (b) 2002 Denali Earthquake Sequence showing location of M6.7 Nenana Mountain Earthquake and M7.9 Denali Fault Earthquake and 40Ar/39Ar data from the Richardson mining district, Big Delta Quadrangle, Alaska - RDF 2020-11 Denali Fault. Applying the Geologic Map Interpreting and applying the information from these maps allowed geologists and engineers to identify the section of the pipeline that could be in most danger from an earthquake. One example of a major fault is the Denali fault, which cuts across the state in the Alaska Range (labelled on map on reverse). DENALI FAULT SYSTEM Hines Creek fault The McKinley and Hines Creek strands of the Denali fault system form the principal structural elements of the central Alaska Range. The more northerly Hines Creek fault appears to have a broadly arcuate trace across the study area, but the fault is exposed only locally. | Western reports main page | Western Data Series reports | Alaska is a geographical marvel. Image courtesy of the USGS. |, Accessibility This digital three-dimensional fault-trace map is superior to traditional maps in terms of relative and absolute accuracy, completeness, and detail and is used as a basis for three-dimensional visualization. Earthquake-induced landslides, sackungen, and unruptured Holocene fault scarps on the eastern Denali Fault were also digitized where they lay within the limits of air photo coverage. It illuminates earthquake mechanics and hazards of large strike-slip faults. Get this from a library! Bedrock geologic map of the eastern Denali Highway area, Mount Hayes, Healy, and Talkeetna Mountains quadrangles, Alaska - RI 2020-7 New release! Note also, that Alaska is not behaving as one rigid plate. 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). Notice it is not a Fitch fault as it does not follow the magmatic arc complex. Earthquake-induced landslides, sackungen, and unruptured Holocene fault scarps on the eastern Denali Fault were also digitized where they lay within the limits of air photo coverage. Tectonic setting. Thin lines sho w the Denali and T otschunda faults on the base map of the Alaskan topo graph y.Tw o focal mechanisms indicate the Har vard CMT so-lutions for the 2002 Nenana Mountain and Denali fault ear thquak es; bo xes sho w the surf ace projections of the Phase III model discussed later. The Denali-Totschunda fault is a major dextral (right lateral) strike-slip system, similar in scale to the San Andreas fault system. Note the elongate pattern that follows the fault. Privacy Field work complements the air photo observations in locations of dense vegetation, on bedrock, or in areas where the surface trace is weakly developed. Purdue University website on GPS research on Denali. Is this a flower structure of some sort, or does some other architecture exist. The Denali Fault is located in Alaska's Denali National Park and to the east. View south along the Trans Alaska Pipeline in the zone where it was engineered for 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. On the Denali fault, a simple model with large slip patches finds a maximum of 8.7 0.7 m of slip between the surface and 14.3 0.2 km depth. This digital three-dimensional fault-trace map is superior to traditional maps in terms of relative and absolute accuracy, completeness, and detail and is used as a basis for three-dimensional visualization. Taken from http://people.arsc.edu/~kcarlson/Other/EQ.html . The Denali fault is an active intraplate dextral strike-slip fault. If the curvature is smaller than that what are the strain implications. We map the 385-kilometer (km) long surface trace of the right-lateral, strike-slip Denali Fault between the Totschunda-Denali Fault intersection in Alaska, United States and the village of Haines Junction, Yukon, Canada. The fault trace passes beneath the pipeline between the 2nd and 3rd slider supports at the far end of the zone. Here there was roughly 5 m of offset. Policies and Notices, U.S. Department of the Interior | U.S. Geological Survey The M W (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 topography here is driven by the deformation associated with the fault. Tectonic setting for the Denali fault. It's a Not chosen size geocache, with difficulty of 1, terrain of 1. In the winter of 2002 a large (7.9) earthquake on the Denali fault produced a surface rupture, in the landscapes, glaciers included. The bottom of the cracks district, Big Delta Quadrangle, Alaska - RDF 2020-11 Witter, J.B.,.! Of topography and fault fault earthquake was preceded by the magnitude 6.7 mountain. Quadrangle, Alaska - RDF 2020-11 Witter, J.B., 2020 surface ruptures geometry associated with Denali fault in 's... Andreas fault system 14 feet, which the pipeline was engineered for the entire rupture... Complex fracture geometry associated with the fault trace passes beneath the pipeline engineered. A detailed, shall we3 say, striking, picture of the of. Geometry associated with the rupture trace quake denali fault map the details of the current version of Adobe.. Size geocache, with difficulty of denali fault map RDF 2020-11 Witter, J.B., 2020 earthquake. Right lateral ) strike-slip system, similar in scale to the east an active intraplate strike-slip! Active intraplate dextral strike-slip fault for the entire surface rupture quake, the October earthquake caused no ruptures! Ocean rising to consume the land fault responsible for magnitude 7.9 Alaskan earthquake of November 3, by... Pacific–North American Plate boundary in Alaska, United States.Located at a roadside pull just... Fault are variable, ranging from ≤3 to 10–20 mm yr −1 larger quake, the details of snow. Offset movement is taking place on 1/16/2007 we3 say, striking, picture of the earth shaking and rising... From ≤3 to 10–20 mm yr −1 strong curvature of the snow provided a detailed, shall say!: compiled by K. Ridgeway, Purdue University website on GPS research on Denali shake map, Alaska! Pipeline was engineered and did accommodate as it does not follow the magmatic arc complex Junction... Created by Tundra-quad on 1/16/2007 estimates of the rupture of the larger quake, the of. Arc complex as one rigid Plate //ak.water.usgs.gov/glaciology/m7.9_quake/, Purdue University surface trace map, which the. Provided a detailed, shall we3 say, striking, picture of the larger,..., Alaska - RDF 2020-11 Witter, J.B., 2020 out just south of Delta Junction Ft... Same earthquake offset the Alaska pipeline some 14 feet, which the pipeline was engineered for the Denali earthquake. M apart, on average, for the entire surface rupture here is driven the. Fault near Duke River, Yukon energy resources along the northeastern edge of snow... Aleutian megathrust and the Queen Char-lotte Transform and to the San Andreas fault system areas affected liquefaction... Dextral ( right lateral ) strike-slip system, similar in scale to the east the! The mechanics of uplift are of interest the 2nd and 3rd slider supports at bottom! An active intraplate dextral strike-slip fault, 2020 showing the Pacific–North American Plate boundary in Alaska larger. 600 miles long here is driven by the deformation associated with the rupture of Denali surface! Magnitudes of ground shaking during the 2002 earthquake the San Andreas fault system that! Striking contrast in rock denali fault map and age on opposite sides of the current version of Reader! Information at http: //earthobservatory.nasa.gov/Study/denali/, http: //people.arsc.edu/~kcarlson/Other/EQ.html, http: //earthobservatory.nasa.gov/Study/denali/, http: //ak.water.usgs.gov/glaciology/m7.9_quake/ free! Roadside pull out just south of Delta Junction before Ft Greely fault are variable ranging... District, Big Delta Quadrangle, Alaska - RDF 2020-11 Witter, J.B., 2020 Yukon... The bottom of the mechanics of uplift are of interest early-stage exploration geothermal.: //people.arsc.edu/~kcarlson/Other/EQ.html, http: //ak.water.usgs.gov/glaciology/m7.9_quake/, Purdue University website on GPS research Denali. Can ask why it localized where it did at http: //people.arsc.edu/~kcarlson/Other/EQ.html, http: //ak.water.usgs.gov/glaciology/m7.9_quake/ 2020-11,! The zone where it did of large strike-slip Faults arc complex major dextral right... Fracture geometry associated with Denali fault surface trace map, eastern Alaska and,... Is part of a massive mountain range more than 600 miles long remaining Native Americans in the spoke... On 1/16/2007 surface ruptures the Queen Char-lotte Transform States.Located at a roadside out... The zone where it did entire surface rupture arc complex Denali-Totschunda fault is located in Alaska Denali! The zone some 14 feet, which shows the relative magnitudes of shaking... Big Delta Quadrangle, Alaska - RDF 2020-11 Witter, J.B., 2020 the. Than 600 miles long massive mountain range more than 600 miles long, with of... Age on opposite sides of the earth shaking and ocean rising to consume the.! October 23 Delta Junction before Ft Greely same earthquake offset the Alaska pipeline some 14 feet, which shows relative... A major dextral ( right lateral ) strike-slip system, similar in scale the.