Coseismic slip distribution of the 2002 MW7.9 Denali fault earthquake, Alaska, determined from GPS measurements

Details Coseismic slip distribution of the 2002 MW7.9 Denali fault earthquake, Alaska, determined from GPS measurements Coseismic slip distribution of the 2002 MW7.9 Denali fault earthquake, Alaska, determined from GPS measurements

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30m...3h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 13, pp. 3-1, CiteID 1670, DOI 10.1029/2003GL017447

Physics

10

Geodesy And Gravity: Seismic Deformations (7205), Geodesy And Gravity: Space Geodetic Surveys, Seismology: Earthquake Dynamics And Mechanics, Tectonophysics: Continental Neotectonics, Tectonophysics: Plate Motions-Present And Recent (3040)

Scientific paper

On 3 November 2002 an M W7.9 earthquake occurred in central Alaska. The earthquake ruptured portions of the Susitna Glacier, Denali, and Totschunda faults. Inversion of the GPS-measured displacement field indicates that the event was dominated by a complex, right-lateral strike-slip rupture along the Denali fault. GPS sites closest to the epicenter show the effect of thrust motion on the Susitna Glacier fault. The preferred coseismic slip model, with M W7.8, indicates relatively low slip on the western part of the rupture and high slip from about 60 km east of the hypocenter extending to the junction of the Denali and Totschunda faults. We find mostly shallow slip from the surface to 15 km depth, but the inversion suggests one large deep slip patch about 110 km east of the hypocenter. Our model predicts surface slip in good agreement with surface geological observations, where model resolution is good.

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