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Improved inversion for seismic structure using transformed,S-wavevector receiver functions: Removing the effect of the free surface

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posted on 2023-05-16, 19:48 authored by Anya ReadingAnya Reading, Kennett, BLN, Sambridge, M
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.

History

Publication title

Geophysical Research Letters

Volume

30

Issue

19

Pagination

1981

ISSN

0094-8276

Department/School

School of Natural Sciences

Publisher

American Geophysical Union

Place of publication

Washington USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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