Travel times of S and SKS: implications for three-dimensional lower mantle structure beneath the central Pacific

E. J. Garnero, D. V. Helmberger

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The travel times of S and SKS phases from deep-focus Fiji-Tonga events exhibit a strong azimuthal dependence. The differential times of S-SKS exhibit relatively little scatter and are used to investigate three-dimensional mantle models for the central Pacific region. Anomalously large S-SKS times suggest a slow lower mantle beneath the central Pacific. These results are compared to the predictions of three tomographic models. The three-dimensional whole mantle models have been parametrized into 11 spherical shells. Qualitative agreement between the tomographic model predictions and observations is encouraging, varying from fair to good. -with Authors

Original languageEnglish (US)
Pages (from-to)8225-8241
Number of pages17
JournalJournal of geophysical research
Volume98
Issue numberB5
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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