Improved inversion for seismic structure using transformed, S-wavevector receiver functions: Removing the effect of the free surface
Date
2003
Authors
Kennett, Brian
Reading, Anya
Sambridge, Malcolm
Journal Title
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Volume Title
Publisher
American Geophysical Union
Abstract
The determination of structure from the inversion of teleseismic receiver functions may be improved by removing the contribution of the free surface. The free surface interaction gives rise to the highest amplitude signal on standard receiver functions and yet this initial pulse tells us little about the receiver structure below the surface layer. We apply a transformation to P, S and Horizontal wavevector components, which removes the free surface response and hence the initial P-pulse. A "pure" receiver function is calculated by deconvolving the S-wavevector component with the P-wavevector. In general, converted phase amplitudes within the receiver function waveform are better matched by the inverse algorithm, resulting in an improved estimation of seismic structure. In particular, low amplitude receiver function waveforms, often associated with poorly constrained structure, now yield a successful inverse.
Description
Keywords
Keywords: Functions; Surface waves; Waveform analysis; Seismic structure; Seismology; data inversion; P-wave; S-wave; seismic tomography; teleseismic wave
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Source
Geophysical Research Letters
Type
Journal article
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Restricted until
2037-12-31