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The Influence of 3-D Structure on the Propagation of Seismic Waves Away from Earthquakes

Kennett, Brian; Furumura, Takahashi

Description

The seismic records from significant earthquakes are profoundly affected by 3-D variations in crustal structure both in the source zone itself and in propagation to some distance. Even in structurally complex zones such as Japan and Mexico relatively coherent arrivals are found associated with different classes of propagation paths. The presence of strong lateral variations can disrupt the arrivals, and impose significant variations in propagation characteristics for different directions from...[Show more]

dc.contributor.authorKennett, Brian
dc.contributor.authorFurumura, Takahashi
dc.date.accessioned2015-12-13T23:40:18Z
dc.identifier.issn0033-4553
dc.identifier.urihttp://hdl.handle.net/1885/94407
dc.description.abstractThe seismic records from significant earthquakes are profoundly affected by 3-D variations in crustal structure both in the source zone itself and in propagation to some distance. Even in structurally complex zones such as Japan and Mexico relatively coherent arrivals are found associated with different classes of propagation paths. The presence of strong lateral variations can disrupt the arrivals, and impose significant variations in propagation characteristics for different directions from the source as illustrated by observations for the 1995 Kobe and 2000 Tottori-ken Seibu earthquakes in western Japan. Such effects can be modelled in 3 dimensions using a hybrid scheme with a pseudospectral representation for horizontal coordinates and finite differences in depth. This arrangement improves parallel implementation by minimising communication costs. For a realistic 3-D model for the structure in western Japan the 3-D simulations to frequencies close to 1 Hz provide a good representation of the observations from subduction zones events such as the 1946 Nankai earthquake and the 2000 Tottori-ken Seibu earthquake. The model can therefore be used to investigate the pattern of ground motion expected for future events e.g., in current seismic gaps.
dc.publisherBirkhauser Verlag
dc.sourcePure and Applied Geophysics
dc.subjectKeywords: earthquake; ground motion; model; seismic wave; structural geology; wave propagation; city; computer simulation; earthquake; Japan; Mexico; model; seismic wave; seismology; three dimensional imaging; urban area 3-D numerical simulation; Finite differences; Ground motion patterns; Pseudospectral method; Regional phases
dc.titleThe Influence of 3-D Structure on the Propagation of Seismic Waves Away from Earthquakes
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume159
dc.date.issued2002
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.ariespublicationMigratedxPub23991
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.startpage2113
local.bibliographicCitation.lastpage2131
local.identifier.doi10.1007/s00024-002-8726-7
dc.date.updated2015-12-12T09:28:44Z
local.identifier.scopusID2-s2.0-0036677568
CollectionsANU Research Publications

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