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Coseismic sediment deformation during the 1989 Loma Prieta earthquake

Ronaldo I. Borja; WaiChing Sun

Title:
Coseismic sediment deformation during the 1989 Loma Prieta earthquake
Author(s):
Borja, Ronaldo I.
Sun, WaiChing
Date:
Type:
Articles
Department(s):
Civil Engineering and Engineering Mechanics
Volume:
113
Persistent URL:
Book/Journal Title:
Journal of Geophysical Research: Solid Earth
Abstract:
Inelastic horizontal sediment deformation from the MS 7.1, 17 October 1989 Loma Prieta earthquake has been estimated to be on the order of 20 cm at a site in Gilroy, California, about 32 km east of the epicenter. This estimate was based on combined deterministic-stochastic simulations using ground motion data and sediment properties measured from in situ seismic tests and laboratory tests on cored sediment samples of up to 170 m deep. The calculated deformation is comparable to measured horizontal coseismic displacements at various stations in the Santa Cruz network, suggesting that previously back-figured fault rupture mechanisms may have been influenced by the coseismic sediment deformation.
Subject(s):
Geophysics
Geology, Stratigraphic
Publisher DOI:
https://doi.org/10.1029/2007JB005265
Item views
330
Metadata:
text | xml
Suggested Citation:
Ronaldo I. Borja, WaiChing Sun, , Coseismic sediment deformation during the 1989 Loma Prieta earthquake, Columbia University Academic Commons, .

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