About: Moment tensor inversion of waveforms: a two-step time-frequency approach

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present a moment tensor inversion of waveforms, which is more robust and yields more stable and more accurate results than standard approaches. The inversion is performed in two steps and combines inversions in time and frequency domains. First, the inversion for the source-time function is performed in the frequency domain using complex spectra. Second, the time-domain inversion for the moment tensor is performed using the source-time function calculated in the first step. In this way, we can consider a realistic, complex source-time function and still keep the final moment tensor inversion linear. Using numerical modelling, we compare the efficiency and accuracy of the proposed approach with standard waveform inversions. We study the sensitivity of the retrieved double-couple and non-double-couple components of the moment tensors to noise in the data, to inaccuracies of the location and of the velocity model, and to the type of the focal mechanism. We present a moment tensor inversion of waveforms, which is more robust and yields more stable and more accurate results than standard approaches. The inversion is performed in two steps and combines inversions in time and frequency domains. First, the inversion for the source-time function is performed in the frequency domain using complex spectra. Second, the time-domain inversion for the moment tensor is performed using the source-time function calculated in the first step. In this way, we can consider a realistic, complex source-time function and still keep the final moment tensor inversion linear. Using numerical modelling, we compare the efficiency and accuracy of the proposed approach with standard waveform inversions. We study the sensitivity of the retrieved double-couple and non-double-couple components of the moment tensors to noise in the data, to inaccuracies of the location and of the velocity model, and to the type of the focal mechanism. (en)
Title	Moment tensor inversion of waveforms: a two-step time-frequency approach Moment tensor inversion of waveforms: a two-step time-frequency approach (en)
skos:prefLabel	Moment tensor inversion of waveforms: a two-step time-frequency approach Moment tensor inversion of waveforms: a two-step time-frequency approach (en)
skos:notation	RIV/67985530:_____/12:00379336!RIV13-AV0-67985530
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP210/12/1491), P(IAA300120801), Z(AV0Z30120515)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Vavryčuk, Václav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	151576
http://linked.open...ai/riv/idVysledku	RIV/67985530:_____/12:00379336
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	earthquake source observations; computational seismology; wave propagation; dynamics and mechanics of faulting (en)
http://linked.open.../riv/klicoveSlovo	dynamics and mechanics of faulting earthquake source observations wave propagation computational seismology
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[8D26B9ADF6E3]
http://linked.open...i/riv/nazevZdroje	Geophysical Journal International
http://linked.open...in/vavai/riv/obor	DC
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Seismic waves and sources in anisotropic media II Physical processes in an earthquake source: from micro- to macro-scale
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	190
http://linked.open...iv/tvurceVysledku	Vavryčuk, Václav Kühn, D.
http://linked.open...ain/vavai/riv/wos	000307571100034
http://linked.open...n/vavai/riv/zamer	Study of the internal structure and dynamics of the Earth
issn	0956-540X
number of pages	16 (xsd:int)
http://bibframe.org/vocab/doi	10.1111/j.1365-246X.2012.05592.x

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