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Published September 2016 | Supplemental Material + Published
Journal Article Open

Structure of the Los Angeles Basin from ambient noise and receiver functions

Abstract

A velocity (V_s) and structure model is derived for the Los Angeles Basin, California based on ambient-noise surface wave and receiver-function analysis, using data from a low-cost, short-duration, dense broad-band survey (LASSIE) deployed across the basin. The shear wave velocities show lateral variations at the Compton-Los Alamitos and the Whittier Faults. The basement beneath the Puente Hills–San Gabriel Valley shows an unusually high velocity (∼4.0 km s^(−1)) and indicates the presence of schist. The structure of the model shows that the basin is a maximum of 8 km deep along the profile and that the Moho rises to a depth of 17 km under the basin. The basin has a stretch factor of 2.6 in the centre grading to 1.3 at the edges and is in approximate isostatic equilibrium.

Additional Information

© 2016 The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. Accepted 2016 June 20. Received 2016 June 18; in original form 2016 March 29. First published online: June 29, 2016. We thank our partners in the LASSIE survey: Nodalseismic (Dan Hollis and Mitchell Barklage), USGS (Elizabeth Cochran), UCLA (Paul Davis) and CalPoly Pomona (J. Polet). This project was partially supported by the USGS/Caltech Cooperative Agreement G14AC00109 and SCEC Project 15018.

Attached Files

Published - Geophys._J._Int.-2016-Ma-1645-51.pdf

Supplemental Material - supp.pdf

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August 22, 2023
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