Distance and Azimuthal Dependence of Ground-Motion Variability for Unilateral Strike-Slip Ruptures

Jagdish Chandra Vyas, Paul Martin Mai, Martin Galis

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We investigate near-field ground-motion variability by computing the seismic wavefield for five kinematic unilateral-rupture models of the 1992 Mw 7.3 Landers earthquake, eight simplified unilateral-rupture models based on the Landers event, and a large Mw 7.8 ShakeOut scenario. We include the geometrical fault complexity and consider different 1D velocity–density profiles for the Landers simulations and a 3D heterogeneous Earth structure for the ShakeOut scenario. For the Landers earthquake, the computed waveforms are validated using strong-motion recordings. We analyze the simulated ground-motion data set in terms of distance and azimuth dependence of peak ground velocity (PGV). Our simulations reveal that intraevent ground-motion variability Graphic is higher in close distances to the fault (
Original languageEnglish (US)
Pages (from-to)1584-1599
Number of pages16
JournalBulletin of the Seismological Society of America
Volume106
Issue number4
DOIs
StatePublished - Jun 21 2016

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