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Regional S-wave structure for southern California from the analysis of teleseismic Rayleigh waves

Hadley, David and Kanamori, Hiroo (1979) Regional S-wave structure for southern California from the analysis of teleseismic Rayleigh waves. Geophysical Journal of the Royal Astronomical Society, 58 (3). pp. 655-666. ISSN 0016-8009. doi:10.1111/j.1365-246X.1979.tb04800.x.

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Teleseismic Rayleigh waves, M_S > 7.0, in the period range 14 to 28 s, are well recorded by the short-period Benioff array within southern California. Multiple arrivals that hinder the determination of local phase velocity curves are detected by narrow band-pass filtering. The records are then windowed on distinct, coherent peaks that move uniformly across the array. Four to seven stations are included in the determination of both the phase velocity across the array and the incidence azimuth. For earthquakes in the western Pacific, the derived incidence azimuths are systematically rotated counterclockwise by 2–16°. Most of this rotation results from refraction at the continental shelf. Phase velocity data for both the southern Mojave—central Transverse Ranges and the Peninsular Ranges are inverted to obtain regional S-wave velocity models. The starting models are constructed from travel-time studies of local sources, both natural and artificial. Poisson's ratio as a function of depth is calculated for these two regions. The comparison of Poisson's ratio with laboratory ultrasonic studies requires a quartz-rich crust within the southern Mojave—central Transverse Ranges and a mafic crust within the Peninsular Ranges.

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Kanamori, Hiroo0000-0001-8219-9428
Additional Information:Copyright © 1979 The Royal Astronomical Society. Received 1979 January 16; in original form 1978 April 10. We thank Dave Harkrider for the computer program used to calculate the layer partial derivatives, and D. Forsyth, R. Mitchel and J. Dewey for critically reviewing the manuscript. This work was sponsored by the USGS under Contract Nos 14-08-0001-15893 and 14-08-0001-16711. Contribution No. 3054 of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA.
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Caltech Division of Geological and Planetary Sciences3054
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Official Citation:David Hadley and Hiroo Kanamori Regional S-wave structure for southern California from the analysis of teleseismic Rayleigh waves Geophys. J. Int. (1979) 58 (3): 655-666 doi:10.1111/j.1365-246X.1979.tb04800.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51609
Deposited By: George Porter
Deposited On:12 Nov 2014 00:07
Last Modified:10 Nov 2021 19:13

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