Velocity Models for the Los Angeles Basin Using Dense Arrays

Robert Clayton & Dan Hollis, Caltech Seismological Laboratory & Sisprobe

Wednesday, March 3, 2021 at 10:30 AM

Location
Online-only seminar via Microsoft Teams

Seismic hazard in the Los Angeles area is controlled in large part by the near-surface shear-wave velocity. Maps of Vs30 have traditionally filled this role, but it is increasingly recognized that we need estimate that extend down to 2-3 km or deeper to properly explain the level or lateral variations of strong ground motions. In this talk we present shear wave velocity models determined using dense seismic arrays. Specifically, we present results for the coastal area, the central LA Basin and the northern LA Basin. We will also present a plan to conduct a survey across the entire LA Basin region using a dense array.

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