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Observations and interpretation of fundamental mode Rayleigh wavefields recorded by the Transportable Array (USArray)

Journal of Geophysical Research B: Solid Earth

By:
DOI: 10.1029/2007JB005556

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Abstract

Broadband recordings of the dense Transportable Array (TA) in the western United States provide unparalleled detailed images of long-period seismic surface wavefields. With 400 stations spanning most of the western United States, wavefronts of fundamental mode Rayleigh waves may be visualized coherently across the array at periods ???40 s. In order to constrain the Rayleigh wave phase velocity structure in the western United States, I assemble a data set of vertical component seismograms from 53 teleseismic events recorded by the TA from April 2006 to October 2007. Complex amplitude spectra from these recordings at peni ods 27-100 s are interpreted using the multiplane wave tomographic method of Friederich and Wielandt (1995) and Pollitz (1999). This analysis yields detailed surface wave phase velocity and three-dimensional shear wave velocity patterns across the North American plate boundary zone, elucidating the active processes in the highly heterogeneous western U.S. upper mantle.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Observations and interpretation of fundamental mode Rayleigh wavefields recorded by the Transportable Array (USArray)
Series title:
Journal of Geophysical Research B: Solid Earth
DOI:
10.1029/2007JB005556
Volume
113
Issue:
10
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article