Observations of shear-coupled P waves.

George Zandt, G. E. Randall

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We observed several shear-coupled P waves on seismograms of deep earthquakes recorded at broadband seismic stations (RSTN) in N America. For these paths, large amplitudes relative to SV characterize the lithospheric multiple near 50o, with amplitudes decreasing rapidly beyond 6o. Calculation of synthetic seismograms indicate that a post-critical reflection from a discontinuity at 70-80 km depth where compressional velocity increases abruptly to about 8.5 km/s produce the largest amplitude P arrival. The observations of these shear-coupled P waves presents a previously untapped source of information about the fine structure of the upper mantle.-from Authors

Original languageEnglish (US)
Pages (from-to)565-568
Number of pages4
JournalGeophysical Research Letters
Volume12
Issue number9
StatePublished - 1985
Externally publishedYes

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P waves
P-wave
seismograms
shear
synthetic seismogram
seismogram
arrivals
upper mantle
discontinuity
Earth mantle
earthquakes
stations
fine structure
broadband
earthquake

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Observations of shear-coupled P waves. / Zandt, George; Randall, G. E.

In: Geophysical Research Letters, Vol. 12, No. 9, 1985, p. 565-568.

Research output: Contribution to journalArticle

Zandt, G & Randall, GE 1985, 'Observations of shear-coupled P waves.', Geophysical Research Letters, vol. 12, no. 9, pp. 565-568.
Zandt, George ; Randall, G. E. / Observations of shear-coupled P waves. In: Geophysical Research Letters. 1985 ; Vol. 12, No. 9. pp. 565-568.
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