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

Ma, Yiran and Clayton, Robert W. (2016) Structure of the Los Angeles Basin from ambient noise and receiver functions. Geophysical Journal International, 206 (3). pp. 1645-1651. ISSN 0956-540X. http://resolver.caltech.edu/CaltechAUTHORS:20160819-085614479

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/gji/ggw236DOIArticle
http://gji.oxfordjournals.org/content/206/3/1645PublisherArticle
http://gji.oxfordjournals.org/content/206/3/1645/suppl/DC1PublisherSupporting Information
ORCID:
AuthorORCID
Ma, Yiran0000-0002-8369-3310
Clayton, Robert W.0000-0003-3323-3508
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.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
USGSG14AC00109
Southern California Earthquake Center (SCEC)15018
Subject Keywords:Interferometry; Interface waves; Seismic tomography
Record Number:CaltechAUTHORS:20160819-085614479
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160819-085614479
Official Citation:Yiran Ma and Robert W. Clayton Structure of the Los Angeles Basin from ambient noise and receiver functions Geophys. J. Int. (September, 2016) 206 (3): 1645-1651 first published online June 29, 2016 doi:10.1093/gji/ggw236
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69770
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Aug 2016 21:53
Last Modified:17 Apr 2017 22:56

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