Full-waveform inversion of triplicated data using a normalized-correlation-coefficient-based misfit function

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dc.citation.firstpage1517en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitleGeophysical Journal Internationalen_US
dc.citation.lastpage1524en_US
dc.citation.volumeNumber210en_US
dc.contributor.authorTao, Kaien_US
dc.contributor.authorGrand, Stephen P.en_US
dc.contributor.authorNiu, Fenglinen_US
dc.date.accessioned2017-10-27T15:22:49Zen_US
dc.date.available2017-10-27T15:22:49Zen_US
dc.date.issued2017en_US
dc.description.abstractIn seismic full-waveform inversion (FWI), the choice of misfit function determines what information in data is used and ultimately affects the resolution of the inverted images of the Earth's structure. Misfit functions based on traveltime have been successfully applied in global and regional tomographic studies. However, wave propagation through the upper mantle results in multiple phases arriving at a given receiver in a narrow time interval resulting in complicated waveforms that evolve with distance. To extract waveform information as well as traveltime, we use a misfit function based on the normalized correlation coefficient (CC). This misfit function is able to capture the waveform complexities in both phase and relative amplitude within the measurement window. It is also insensitive to absolute amplitude differences between modeled and recorded data, which avoids problems due to uncertainties in source magnitude, radiation pattern, receiver site effects or even miscalibrated instruments. These features make the misfit function based on normalized CC a good candidate to achieve high-resolution images of complex geological structures when interfering phases coexist in the measurement window, such as triplication waveforms. From synthetic tests, we show the advantages of this misfit function over the cross-correlation traveltime misfit function. Preliminary inversion of data from an earthquake in Northeast China images a sharper and stronger amplitude slab stagnant in the middle of the transition zone than FWI of cross-correlation traveltime.en_US
dc.identifier.citationTao, Kai, Grand, Stephen P. and Niu, Fenglin. "Full-waveform inversion of triplicated data using a normalized-correlation-coefficient-based misfit function." <i>Geophysical Journal International,</i> 210, no. 3 (2017) Oxford University Press: 1517-1524. https://doi.org/10.1093/gji/ggx249.en_US
dc.identifier.doihttps://doi.org/10.1093/gji/ggx249en_US
dc.identifier.urihttps://hdl.handle.net/1911/97817en_US
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleFull-waveform inversion of triplicated data using a normalized-correlation-coefficient-based misfit functionen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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