Global and regional surface-wave inversions: A spherical-spline parameterization

Zheng Wang, Jeroen Tromp, Göran Ekström

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

A surface-wave phase-velocity inversion scheme based upon a compactly supported cubic B-spline basis on a triangular grid of knots with approximately equal inter-knot spacing is implemented to perform global, regional and variable resolution inversions. Numerical results show that the inverted phase-velocity maps based upon this method are similar to those obtained using a global spherical-harmonic representation. Nonlinear inversions incorporating ray refraction are feasible based upon the spherical-spline model parameterization and the resulting maps are only slightly different from those based upon the great-circle approximation. A multiresolution analysis is introduced to obtain finer resolution in regions with good ray coverage and lower resolution in regions with poor coverage.

Original languageEnglish (US)
Pages (from-to)207-210
Number of pages4
JournalGeophysical Research Letters
Volume25
Issue number2
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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