Coseismic sediment deformation during the 1989 Loma Prieta earthquake
Article first published online: 19 AUG 2008
Copyright 2008 by the American Geophysical Union.
Journal of Geophysical Research: Solid Earth (1978–2012)
Volume 113, Issue B8, August 2008
How to Cite
2008), Coseismic sediment deformation during the 1989 Loma Prieta earthquake, J. Geophys. Res., 113, B08314, doi:10.1029/2007JB005265., and (
- Issue published online: 19 AUG 2008
- Article first published online: 19 AUG 2008
- Manuscript Accepted: 14 APR 2008
- Manuscript Revised: 6 FEB 2008
- Manuscript Received: 31 JUL 2007
- Sediment deformation;
- earthquake ground motion;
- baseline corrections
 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.