Full waveform tomography for the upper South Island region, New Zealand

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dc.contributor.authorNguyen A
dc.contributor.authorLee R
dc.contributor.authorGraves R
dc.contributor.authorBradley, Brendon
dc.date.accessioned2021-11-23T00:48:22Z
dc.date.available2021-11-23T00:48:22Z
dc.date.issued2021en
dc.date.updated2021-07-05T10:08:18Z
dc.description.abstractIn this paper, we apply Full Waveform Tomography (FWT) based on the Adjoint-Wavefield (AW) method to iteratively invert an existing 3-D geophysical velocity model for the upper South Island region, New Zealand. Through the AW method, gradients of model parameters (compressional and shear wave velocities) were computed by implementing the cross-adjoint of forward and backward wave fields. We used L-BFGS/ line search algorithms to obtain a model update. For real data analysis, misfit measurements based on data from broadband stations were utilized. The misfit measure is a frequency-dependent multi-taper travel-time difference at periods from 10 - 40 s. After the iterative inversion, the simulated seismograms computed using our final velocity model shows good agreement to the observed data.en
dc.identifier.citationNguyen A, Bradley BA, Lee R, Graves R (2021). Full waveform tomography for the upper South Island region, New Zealand. Christchurch, New Zealand: New Zealand Society for Earthquake Engineering Annual Conference. 14/04/2021-16/04/2021.en
dc.identifier.urihttps://hdl.handle.net/10092/103002
dc.language.isoen
dc.rightsAll rights reserved unless otherwise stateden
dc.rights.urihttp://hdl.handle.net/10092/17651en
dc.subject.anzsrcFields of Research::37 - Earth sciences::3706 - Geophysics::370609 - Seismology and seismic explorationen
dc.titleFull waveform tomography for the upper South Island region, New Zealanden
dc.typeConference Contributions - Publisheden
uc.collegeFaculty of Engineering
uc.departmentCivil and Natural Resources Engineering
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