Investigation of deep slab structure using long-period S waves

J. B. Gaherty, T. Lay, J. E. Vidale

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Travel times and amplitudes of long-period SH, ScSH, sSH; and sScSH phases from several deep focus earthquakes in the northwest Pacific are analyzed for evidence of lithospheric slab penetration into the lower mantle. Inclusion of amplitude observations in the analysis provides constraints on lateral velocity gradients present in the deep slabs which are not resolvable using travel times alone. The observations support shorter and/or broader slab models than those previously hypothesized: models which can probably be reconciled with P wave data. -from Authors

Original languageEnglish (US)
Pages (from-to)16,349-16,367
JournalJournal of Geophysical Research
Volume96
Issue numberB10
DOIs
StatePublished - 1991
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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