Source model for the Mw 6.7, 23 October 2002, Nenana Mountain Earthquake (Alaska) from InSAR

By T. J. Wright, Zhong Lu, Charles Wicks Jr.. 2003

224 citations recorded by the source corpus.

The 23 October 2002 Nenana Mountain Earthquake (Mw ∼ 6.7) occurred on the Denali Fault (Alaska), to the west of the Mw ∼ 7.9 Denali Earthquake that ruptured the same fault 11 days later. We used 6 interferograms, constructed using radar images from the Canadian Radarsat‐1 and European ERS‐2 satellites, to determine the coseismic surface deformation and a source model. Data were acquired on ascending and descending satellite passes, with incidence angles between 23 and 45 degrees, and time intervals of 72 days or less. Modeling the event as dislocations in an elastic half space suggests that there was nearly 0.9 m of right‐lateral strike‐slip motion at depth, on a near‐vertical fault, and that the maximum slip in the top 4 km of crust was less than 0.2 m. The Nenana Mountain Earthquake increased the Coulomb stress at the future hypocenter of the 3 November 2002, Denali Earthquake by 30–60 kPa.

Subfields: Geophysics

View Paper: https://www.semanticscholar.org/paper/5145a6d46454798f43e507ddc22e80adf9d3fe73

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In Geophysics

Citations in the corpus

Inversion of Surface Deformation Data for Rapid Estimates of Source Parameters and Uncertainties: A Bayesian Approach (2018, methodology): “…also used in previous studies of the 2015 Pishan earthquake (see section 5; Ainscoe et al., 2017; Wen et al., 2016), implies the use of a nonlinear inversion technique capable of finding the weighted least-squares best-fit solution given the data plus simulated noise (e.g., Wright et al., 2003).”