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Regional phases in continental and oceanic environments

Kennett, Brian; Furumura, Takahashi

Description

The very different crustal thicknesses between continental and oceanic crust lead to the establishment of distinct styles of regional seismic wavefield. Observations and numerical simulations of events near subduction zones in Japan allow a direct comparison of seismic wave propagation in oceanic and continental structures. The thick zone of lower seismic velocities in the continental crust acts to trap S-wave energy in particular and generates crustally guided phases such as Pg, Lg. In the...[Show more]

dc.contributor.authorKennett, Brian
dc.contributor.authorFurumura, Takahashi
dc.date.accessioned2015-12-13T23:16:30Z
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/1885/89447
dc.description.abstractThe very different crustal thicknesses between continental and oceanic crust lead to the establishment of distinct styles of regional seismic wavefield. Observations and numerical simulations of events near subduction zones in Japan allow a direct comparison of seismic wave propagation in oceanic and continental structures. The thick zone of lower seismic velocities in the continental crust acts to trap S-wave energy in particular and generates crustally guided phases such as Pg, Lg. In the oceanic environment there is no efficient S-wave trapping and crustal energy progressively leaks into the mantle. Reverberations in the crust and the water above help to sustain the amplitude of the mantle arrivals Pn, Sn to large distances.
dc.publisherBlackwell Publishing Ltd
dc.sourceGeophysical Journal International
dc.subjectKeywords: continental crust; crustal thickness; oceanic crust; seismic velocity; seismic wave; wave propagation; Japan Continental crust; Oceanic crust; Propagation; Regional seismic phases; Seismic wave
dc.titleRegional phases in continental and oceanic environments
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume146
dc.date.issued2001
local.identifier.absfor040313 - Tectonics
local.identifier.ariespublicationMigratedxPub19477
local.type.statusPublished Version
local.contributor.affiliationKennett, Brian, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFurumura, Takahashi, University of Tokyo
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage562
local.bibliographicCitation.lastpage568
local.identifier.doi10.1046/j.1365-246X.2001.01467.x
dc.date.updated2015-12-12T08:48:28Z
local.identifier.scopusID2-s2.0-0034895795
CollectionsANU Research Publications

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