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Seismic moment tensor inversion using a 3-D structural model: applications for the Australian region

Hingee, Myall; Tkalcic, Hrvoje; Fichtner, Andreas; Sambridge, Malcolm

Description

There is significant seismic activity in the region around Australia, largely due to the plate boundaries to the north and to the east of the mainland. This activity results in serious seismic and tsunami hazard in the coastal areas of Australia. Hence seismicity is and will be monitored in real time by Geoscience Australia (GA), which uses a network of permanent broadband seismometers. Seismic moment tensor (MT) solutions are currently determined using 1-D, radially symmetric models of Earth...[Show more]

dc.contributor.authorHingee, Myall
dc.contributor.authorTkalcic, Hrvoje
dc.contributor.authorFichtner, Andreas
dc.contributor.authorSambridge, Malcolm
dc.date.accessioned2015-12-08T22:18:40Z
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/1885/31453
dc.description.abstractThere is significant seismic activity in the region around Australia, largely due to the plate boundaries to the north and to the east of the mainland. This activity results in serious seismic and tsunami hazard in the coastal areas of Australia. Hence seismicity is and will be monitored in real time by Geoscience Australia (GA), which uses a network of permanent broadband seismometers. Seismic moment tensor (MT) solutions are currently determined using 1-D, radially symmetric models of Earth and this requires augmentation by recording stations located outside of Australia. A 3-D model of the Australian continent developed recently using full waveform tomography now offers the opportunity to significantly improve the determination of MT solutions of earthquakes from tectonically active regions. A complete-waveform, time-domain MT inversion method has been developed using a point-source approximation. A series of synthetic tests using first a 1-D and then a 3-D structural model has been performed. The feasibility of deploying 3-D versus 1-D Earth structure for the inversion of seismic data has been studied and the advantages of using the 3-D structural model were illustrated with examples. The 3-D model is superior to the 1-D model, as a number of sensitivity tests show. The ultimate goal of this work is an automated MT inversion system in Australia relying on GA and other international stations, although more work remains to be done before the full implementation of such a scheme in real time.
dc.publisherBlackwell Publishing Ltd
dc.rightsAuthor/s retain copyright
dc.sourceGeophysical Journal International
dc.subjectKeywords: 1-D models; 3D models; Active regions; Activity results; Australia; Broadband seismometers; Coastal area; Early warning; Earth structures; Earthquake source observations; Full-waveforms; Geoscience australia; Inversion methods; Plate boundaries; Real time Early warning; Earthquake source observations; Wave propagation
dc.titleSeismic moment tensor inversion using a 3-D structural model: applications for the Australian region
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume184
dc.date.issued2010
local.identifier.absfor040313 - Tectonics
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.ariespublicationu4278572xPUB83
local.type.statusPublished Version
local.contributor.affiliationHingee, Myall, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTkalcic, Hrvoje, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFichtner, Andreas, Utrecht University
local.contributor.affiliationSambridge, Malcolm, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.startpage949
local.bibliographicCitation.lastpage964
local.identifier.doi10.1111/j.1365-246X.2010.04897.x
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2016-02-24T10:49:04Z
local.identifier.scopusID2-s2.0-78751482305
local.identifier.thomsonID000286225300033
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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