Imaging the upper crust of the Korean peninsula by surface-wave tomography

K. H. Cho, R. B. Herrmann, C. J. Ammon, K. Lee

Research output: Contribution to journalArticle

88 Scopus citations

Abstract

Cross correlation of seismic-background motions (Campillo and Paul, 2003; Shapiro et al., 2005) is applied to observations from the Korean Meteorological Administration seismic network to estimate the short-period Rayleigh and Love wave dispersion characteristics of the region. Standard processing procedures are applied to the cross correlation, except that signal whitening is used in place of one-bit sampling to equalize power in signals from different times. Multiple-filter analysis is used to extract the group velocities from the estimated Green's functions, which are then used to image the spatially varying dispersion at periods between 0.5 and 20 sec. The tomographic inversion technique used inverts all periods simultaneously to provide a smooth dispersion curve as a function of period in addition to the usual smooth spatial image for a given period. The Gyeongsang Basin in the southeastern part of the peninsula is clearly resolved with lower group velocities.

Original languageEnglish (US)
Pages (from-to)198-207
Number of pages10
JournalBulletin of the Seismological Society of America
Volume97
Issue number1 B
DOIs
StatePublished - Feb 1 2007

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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