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dc.contributor.authorTao, Kai
Grand, Stephen P.
Niu, Fenglin
dc.date.accessioned 2017-10-27T15:22:49Z
dc.date.available 2017-10-27T15:22:49Z
dc.date.issued 2017
dc.identifier.citation Tao, Kai, Grand, Stephen P. and Niu, Fenglin. "Full-waveform inversion of triplicated data using a normalized-correlation-coefficient-based misfit function." Geophysical Journal International, 210, no. 3 (2017) Oxford University Press: 1517-1524. https://doi.org/10.1093/gji/ggx249.
dc.identifier.urihttps://hdl.handle.net/1911/97817
dc.description.abstract In 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.
dc.language.iso eng
dc.publisher Oxford University Press
dc.rights Article 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.
dc.title Full-waveform inversion of triplicated data using a normalized-correlation-coefficient-based misfit function
dc.type Journal article
dc.citation.journalTitle Geophysical Journal International
dc.citation.volumeNumber 210
dc.citation.issueNumber 3
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1093/gji/ggx249
dc.type.publication publisher version
dc.citation.firstpage 1517
dc.citation.lastpage 1524


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