Mantle layering from ScS reverberations 1. Waveform inversion of zeroth-order reverberations

J. Revenaugh, T. H. Jordan

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Abstract

This is the first paper in a four-part sequence that examines the nature of mantle layering required by the multiple-ScS phases and internal reflections observed within the reverberative interval of SH-polarized seismograms. Here we present path-averaged estimates of the two-way travel times through the crust+mantle (τScS) and crust alone (τM), the whole mantle quality factor (QScS), and the reflection coefficient at the M discontinuity (R0(zM)) obtained by iterative waveform inversion of ScS reverberations. We show that QScS estimates derived from direct waveform inversion can be biased significantly if reverberations originating within the crust are ignored, especially in continental regions where the crust is thick. -from Authors

Original languageEnglish (US)
Pages (from-to)19,749-19,762
JournalJournal of Geophysical Research
Volume96
Issue numberB12
DOIs
StatePublished - 1991

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