Data report of aftershocks of the 03 November 2002, Mw 7.9 Denali Fault earthquake recorded near the fault rupture at the Richardson Highway and Alyeska Pipeline

2003 ◽  
Author(s):  
David L. Carver ◽  
Timothy Plucinski ◽  
A.D. Frankel ◽  
Erdal Sa
Keyword(s):  
Fault Rupture ◽  
Denali Fault

Numerical Modeling of Near Fault Seismic Ground Motion for Denali Fault

2021 ◽  
Vol 12 (2) ◽  
pp. 0-0
Keyword(s):  
Ground Motion ◽  
Peak Ground Acceleration ◽  
Numerical Study ◽  
Ground Motions ◽  
Numerical Results ◽  
Fault Rupture ◽  
Ground Acceleration ◽  
Denali Fault ◽  
Near Fault ◽  
Good Agreement

An effective earthquake (Mw 7.9) struck Alaska on 3 November, 2002. This earthquake ruptured 340 km along Susitna Glacier, Denali and Totschunda faults in central Alaska. The peak ground acceleration (PGA) was recorded about 0.32 g at station PS10, which was located 3 km from the fault rupture. The PGA would have recorded a high value, if more instruments had been installed in the region. A numerical study has been conducted to find out the possible ground motion record that could occur at maximum horizontal slip during the Denali earthquake. The current study overcomes the limitation of number of elements to model the Denali fault. These numerical results are compared with observed ground motions. It is observed that the ground motions obtained through numerical analysis are in good agreement with observed ground motions. From numerical results, it is observed that the possible expected PGA is 0.62 g at maximum horizontal slip of Denali fault.

scholarly journals Geotechnical Reconnaissance of the 2002 Denali Fault, Alaska, Earthquake

2004 ◽  
Vol 20 (3) ◽  
pp. 639-667 ◽  
Author(s):  
Robert Kayen ◽  
Eric Thompson ◽  
Diane Minasian ◽  
Robb E. S. Moss ◽  
Brian D. Collins ◽  
...  
Keyword(s):  
Strong Motion ◽  
Source Model ◽  
Eastern Region ◽  
Rupture Directivity ◽  
Fault Rupture ◽  
Alluvial Deposits ◽  
Alaska Range ◽  
Denali Fault ◽  
Pump Station ◽  
Portable Apparatus

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. Areas affected by liquefaction are largely confined to Holocene alluvial deposits, man-made embankments, and backfills. Liquefaction damage, sparse surrounding the fault rupture in the western region, was abundant and severe on the eastern rivers: the Robertson, Slana, Tok, Chisana, Nabesna and Tanana Rivers. Synthetic seismograms from a kinematic source model suggest that the eastern region of the rupture zone had elevated strong-motion levels due to rupture directivity, supporting observations of elevated geotechnical damage. We use augered soil samples and shear-wave velocity profiles made with a portable apparatus for the spectral analysis of surface waves (SASW) to characterize soil properties and stiffness at liquefaction sites and three trans-Alaska pipeline pump station accelerometer locations.

Why the 2002 Denali fault rupture propagated onto the Totschunda fault: Implications for fault branching and seismic hazards

2012 ◽  
Vol 117 (B11) ◽  
pp. n/a-n/a ◽  
Author(s):  
David P. Schwartz ◽  
Peter J. Haeussler ◽  
Gordon G. Seitz ◽  
Timothy E. Dawson
Keyword(s):  
Seismic Hazards ◽  
Fault Rupture ◽  
Denali Fault

Landslides Triggered by the 2002 Denali Fault, Alaska, Earthquake and the Inferred Nature of the Strong Shaking

2004 ◽  
Vol 20 (3) ◽  
pp. 669-691 ◽  
Author(s):  
Randall W. Jibson ◽  
Edwin L. Harp ◽  
William Schulz ◽  
David K. Keefer
Keyword(s):  
High Frequency ◽  
Near Field ◽  
Rupture Zone ◽  
Fault Rupture ◽  
Rock Falls ◽  
Ground Shaking ◽  
Denali Fault ◽  
Rock Avalanches ◽  
Landslide Distribution ◽  
Alaska Earthquake

The 2002 M7.9 Denali fault, Alaska, earthquake triggered thousands of landslides, primarily rock falls and rock slides, that ranged in volume from rock falls of a few cubic meters to rock avalanches having volumes as great as 15×106m3. The pattern of landsliding was unusual; the number of slides was less than expected for an earthquake of this magnitude, and the landslides were concentrated in a narrow zone 30-km wide that straddled the fault rupture over its entire 300-km length. The large rock avalanches all clustered along the western third of the rupture zone where acceleration levels and ground-shaking frequencies are thought to have been the highest. Inferences about near-field strong shaking characteristics drawn from the interpretation of the landslide distribution are consistent with results of recent inversion modeling that indicate high-frequency energy generation was greatest in the western part of the fault rupture zone and decreased markedly to the east.

Strong-Motion Records of the 2002 Denali Fault, Alaska, Earthquake

2004 ◽  
Vol 20 (3) ◽  
pp. 579-596 ◽  
Author(s):  
Artak Martirosyan ◽  
Roger Hansen ◽  
Natalia Ratchkovski
Keyword(s):  
Near Field ◽  
Strong Motion ◽  
Fault Rupture ◽  
Ground Acceleration ◽  
Denali Fault ◽  
Motion Data ◽  
Field Recordings ◽  
Pump Station ◽  
Slip Event ◽  
Major Strike

The MW 7.9 Denali Fault earthquake on 3 November 2002 ruptured a 340-km section along the Susitna Glacier, Denali, and Totschunda faults in central Alaska. The earthquake was digitally recorded at more than 55 strong-motion sites throughout the state at distances up to 280 km from the fault rupture. The site closest to the fault, Trans-Alaska Pipeline Pump Station 10, is located about 3 km north of the surface rupture, where the observed maximum horizontal peak ground acceleration was about 0.35 g. The peak horizontal accelerations observed at the sites closest to the fault rupture were considerably smaller than those yielded by the ground-motion prediction equations. Although the earthquake provided a valuable set of strong-motion data, an important opportunity was missed to capture near-field recordings from such a major strike-slip event. A concerted national effort is needed to prioritize the instrumentation of faults that are likely locations of future great earthquakes.

EVIDENCE FOR AND AGAINST MID-CRUSTAL DETACHMENT HORIZONS BASED ON CA. 25 MYR OF HETEROGENEOUS TRANSPRESSION IN THE DENALI FAULT SYSTEM

2019 ◽  
Author(s):  
Trevor S. Waldien ◽  
◽  
Sarah M. Roeske ◽  
Jeffrey A. Benowitz ◽  
Daniel F. Stockli
Keyword(s):  
Fault System ◽  
Denali Fault
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