Phase-velocity inversion from data-based diffraction kernels: seismiv Michelson interferometer
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Date
2021-02Type
- Journal Article
Abstract
We propose a new surface-wave tomography approach that benefits from densely sampled active-source arrays and brings together elements from active-source seismic-wave interferometry, full waveform inversion and dense-array processing. In analogy with optical interferometry, seismic Michelson interferometer uses seismic interference patterns given by the data-based diffraction kernels in an iterative inversion scheme to image a medium. Seismic Michelson interferometer requires no travel-time measurements and no spatial regularisation, and it accounts for bent rays. Furthermore, the method does not need computation of complex synthetic models, as it works as a data-driven inversion technique that makes it computationally very fast. In an automatic way, it provides high-resolution phase-velocity maps and their error estimation. Seismic Michelson interferometer can complete traditional surface-wave tomography studies, as its use can be easily extended from land active seismic data to the virtual source gathers of ambient-noise-based studies with dense arrays. Show more
Publication status
publishedExternal links
Journal / series
Geophysical Journal InternationalVolume
Pages / Article No.
Publisher
Oxford University PressSubject
Seismic interferometry; Surface waves; Fresnel zone phase oscillations; Seismic tomography; InversionOrganisational unit
09558 - Walter, Fabian (ehemalig) / Walter, F. ((former))
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