Deformation of crust and upper mantle in central Tibet caused by the northward subduction and slab tearing of the Indian lithosphere: New evidence based on shear …

C Wu, X Tian, T Xu, X Liang, Y Chen, M Taylor… - Earth and Planetary …, 2019 - Elsevier
Shear-wave splitting provides insight into geodynamic processes such as lithospheric
deformation and upper mantle flow. This study presents shear wave splitting parameters …

Detecting a known near-surface target through application of frequency-dependent traveltime tomography and full-waveform inversion to P-and SH-wave seismic …

J Chen, CA Zelt, P Jaiswal - Geophysics, 2017 - pubs.geoscienceworld.org
We have applied a combined workflow of frequency-dependent traveltime tomography
(FDTT) and full-waveform inversion (FWI) to 2D near-surface P-and SH-wave seismic data to …

Development of an ANN-Based Technique for Inversion of Seismic Refraction Travel Times

R Pourmirzaee, S Hosseini - Journal of Environmental and …, 2024 - library.seg.org
Non-uniqueness in the inversion of seismic data can be considered the main challenge for
the application of such data. Prior information, such as downhole data, can be used to …

Early arrival waveform inversion using data uncertainties and matching filters with application to near-surface seismic refraction data

A Cai, CA Zelt - Geophysics, 2022 - library.seg.org
We develop an early arrival waveform inversion (EAWI) technique for high-resolution near-
surface velocity estimation by iteratively updating the P-wave velocity model to minimize the …

Frequency-dependent traveltime tomography for near-surface seismic refraction data

CA Zelt, J Chen - Geophysical Journal International, 2016 - academic.oup.com
Traveltime tomography is the main method by which the Earth's seismic velocity is
determined on all scales, from the near-surface (< 100 m) to the core. Usually traveltime …

First-arrival traveltime tomography with near-surface structural regularization

Y Wo, HW Zhou, Z Zou, Y Yue - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
In complex near-surface geologic settings, first-arrival traveltime tomography suffers from
strong data noise and uneven raypath coverage. To reduce the inversion nonuniqueness …

Application of frequency-dependent traveltime tomography to 2D crosswell seismic field data

J Liao, Z Guo, H Liu, S Dai, Y Zhao… - Journal of …, 2017 - pubs.geoscienceworld.org
We applied Zelt's new frequency-dependent traveltime tomography (FDTT) method to 2D
crosswell seismic field data from an eastern oil field in China. The FDTT uses the frequency …

Uncertainty Quantification in Tomographic Inversion of Near-Surface Seismic Refraction Data

A Li, D Grana, AD Parsekian, B Carr - Mathematical Geosciences, 2024 - Springer
Understanding the near-surface structure of the Earth requires accurate prediction of
physical properties of the subsurface, such as velocity estimated from tomographic inversion …

Data weighted full-waveform inversion with adaptive moment estimation for near-surface seismic refraction data

A Cai, CA Zelt - SEG International Exposition and Annual Meeting, 2019 - onepetro.org
Full-waveform inversion (FWI) is a technique for high resolution subsurface velocity
estimation. Normally a least-squares error between observed and calculated waveform is …

Integrated geophysical investigations of Main Barton Springs, Austin, Texas, USA

M Saribudak, NM Hauwert - Journal of Applied Geophysics, 2017 - Elsevier
Barton Springs is a major discharge site for the Barton Springs Segment of the Edwards
Aquifer and is located in Zilker Park, Austin, Texas. Barton Springs actually consists of at …