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Seismic source characterization using a Neighbourhood Algorithm

Kennett, Brian; Marson-Pidgeon, K; Sambridge, Malcolm

Description

The full characterization of a seismic source requires the specification of the hypocentre location and the source mechanism. The non-linear inversion is accomplished in two stages using the Neighbourhood Algorithm (NA), a direct search method in parameter space which is able to preferentially sample those regions with least data misfit; there are just two control parameters and no differentiation is employed. The first step is hypocentre location using a 4-D search space and a focussed search...[Show more]

dc.contributor.authorKennett, Brian
dc.contributor.authorMarson-Pidgeon, K
dc.contributor.authorSambridge, Malcolm
dc.date.accessioned2015-12-13T23:15:47Z
dc.date.available2015-12-13T23:15:47Z
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/1885/89055
dc.description.abstractThe full characterization of a seismic source requires the specification of the hypocentre location and the source mechanism. The non-linear inversion is accomplished in two stages using the Neighbourhood Algorithm (NA), a direct search method in parameter space which is able to preferentially sample those regions with least data misfit; there are just two control parameters and no differentiation is employed. The first step is hypocentre location using a 4-D search space and a focussed search strategy. The second step is waveform inversion of the early part of P and S wavetrains to refine source depth and extract the source mechanism. With a moment tensor representation, this second stage explores an 8-D parameter space. For both the hypocentre and source mechanism inversion the NA method provides rapid and effective results with information from just a few stations, as illustrated with an event in southern Xinjiang.
dc.publisherAmerican Geophysical Union
dc.sourceGeophysical Research Letters
dc.subjectKeywords: algorithm; earthquake mechanism; seismic source; source parameters; Algorithms; Parameter estimation; Seismic waves; Neighbourhood algorithms (NA); Seismic source characterization; Seismology
dc.titleSeismic source characterization using a Neighbourhood Algorithm
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume27
dc.date.issued2000
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.ariespublicationMigratedxPub18960
local.type.statusPublished Version
local.contributor.affiliationKennett, Brian, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMarson-Pidgeon, K, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationSambridge, Malcolm, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.issue20
local.bibliographicCitation.startpage3,401
local.bibliographicCitation.lastpage3,403
local.identifier.doi10.1029/2000GL011559
dc.date.updated2015-12-12T08:45:11Z
local.identifier.scopusID2-s2.0-0034353046
CollectionsANU Research Publications

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