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Inversion of synthetic travelime data generated for known models.
Some of these tutorials come with ASCII formatted traveltime data, in the linked .zip archive. Objectively test accuracy of your own method with these data sets.
Blind test of methods for obtaining 2D near-surface seismic velocity models
from first-arrival traveltimes (Zelt et al. JEEG, September 2013, Volume 18, Issue 3, pp. 183–194)
Blind test of methods for obtaining 2D near-surface seismic velocity models
from first-arrival traveltimes (Zelt et al. JEEG, September 2013, Volume 18, Issue 3, pp. 183–194)
Multiscale Conjugate-Gradient WET+WDVS using fail-safe 1D-gradient or DeltatV+XTV starting models for NGU 2018 P1-1D synthetic fault data
DeltatV inversion & Plus-Minus & multiscale WET inversion of synthetic data for NGU 2020 G4 model
Tunnel detection using Frequency-Dependent Traveltime Tomography
(Dr. Parsa Bakhtiari Rad, NCPA 2021)
Resistivity and Seismic Characterization of an Embankment Dam. A Case Study in Northern Sweden
(Alvaro Polin Tornero, Thesis Univ. Uppsala 2018)
Seismic refraction investigation of the Strengbach watershed (Vosges Mountains, France) using P and S-wave first-arrival tomography
(Alan Ross, EOST at Univ. Strasbourg 2017)
Improved interpretation of SAGEEP 2011 blind refraction data using Frequency-Dependent Traveltime Tomography
(Siegfried Rohdewald EGU 2021 online)
Improving the Resolution of Fresnel Volume Tomography with Wavelength-Dependent Velocity Smoothing
(Rohdewald 2021, Expanded Abstract SAGEEP 2021;
slides,
YouTube .MP4)
Multiscale Conjugate-Gradient WET inversion using 1D-gradient starting model for NGU 2018 P1_6-7D synthetic fault data
DeltatV inversion & Plus-Minus & multiscale WET inversion of synthetic data for NGU 2020 G1 model
Conjugate-Gradient WET using DeltatV+XTV starting model for NGU 2018 P1_6-7D synthetic fault data
Frequency-dependent traveltime tomography for near-surface seismic refraction data (Zelt and Chen, Geophys. J. Int 2016)
WDVS-enabled WET inversion of Palmer Fig. 4 synthetic data (Derecke Palmer 1980, The Generalized Reciprocal Method Of Seismic Refraction Interpretation)
Prof. Bob Whiteley compares published interpretations of SAGEEP 2011 blind data with true model
Updated interpretation of SAGEEP11 blind refraction session synthetic data with version 4.01 multiscale WET inversion
Detecting a known near-surface target through application of frequency-dependent traveltime tomography and full-waveform inversion to P- and SH-wave seismic refraction data
(Chen et al. SEG Geophysics 2017)
Comparison of Full Wavefield Synthetics with Frequency-Dependent Traveltimes Calculated Using Wavelength-Dependent Velocity Smoothing
(Chen and Zelt, JEEG June 2017)
Updated Broad Epikarst synthetic data interpretation with Wavelength-Dependend Velocity Smoothing (WDVS)
Cluster Analysis for Cavity Detection Using Seismic Refraction and Electrical Resistivity Tomography (Capizzi et al. Univ. Palermo 2017)
Joint interpretation of seismic refraction tomography and electrical resistivity tomography by cluster analysis to detect buried cavities
(Carollo et al. JAG July 2020)
Seismic prospection by Wiechert-Herglotz method of calculus (Gershanik, Geofisica Pura e Applicata 1957)
Initial velocity model construction of seismic tomography in near-surface applications (Ali Ismet Kanli, JAG 2008)
Plus-Minus Method (J.G. Hagedoorn 1959, EAGE Geophysical Prospecting, volume 7, pp. 158-182)
Detection of fracture zones in bedrock (Georgios Tassis et al. NGU 2017)
Multirun WET inversion of NGU synthetic data with Steepest Descent and Cosine-Squared weighting
Multiscale tomography for SAGEEP11 blind fault model with version 3.34
Multiscale tomography for basement step model with version 3.34
Our SAGEEP 2014 expanded abstract now at library.seg.org
Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity Models from First-Arrival Traveltimes (Colin Zelt et al., JEEG Sep 2013)
Updated tutorial showing how to convert layer model .CSV to layered .GRD starting model (Fig. 17)
An Evaluation of Methods and Available Software for Seismic Refraction Tomography Analysis
(Jacob R. Sheehan et al., JEEG March 2005. Compares Rayfract with GeoTomo LLC GeoCT-II and OYO SeisImager)
Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity Models from First-Arrival Traveltimes (Colin Zelt et al., JEEG Sep 2013)
Our expanded abstract presented at SAGEEP 2014, Boston, MA U.S.A.
Optimized interpretation of SAGEEP 2011 blind refraction data, with Smooth inversion and Plus-Minus method
Kotyrba and Schmidt show combination of seismic and resistivity tomography for the detection of abandoned mine workings
Our contribution to forum.detectation.com SRT modeling and interpretation, with 1.5D DeltatV and 2D WET inversion
1.5D DeltatV and 2D WET inversion, CMP Intercept-Time Refraction layered interpretation of synthetic traveltime data
Tutorial showing how to build a "basement step" model grid with Surfer, and how to generate and invert synthetic shots for this model
Updated PalmFig9 tutorial, now showing Smooth inversion and layer-based Wavefront refraction interpretation of synthetic shots for syncline model
Smooth inversion with free trial, of synthetic data for thrust fault model. Shows successful imaging of strong lateral velocity variation.
Smooth XTV inversion with free trial, of Jacques Jenny THEORIC2.ASC synthetic data for a layered model. Shows Surfer gridding artefacts.
Interpretation of synthetic and field data with surface wave analysis and Rayfract traveltime tomography,
Boiero and Socco, EAGE Geophysical Prospecting Nov 2010.
Master Thesis Stefan Jansen, Niels Bohr Institute, University of Copenhagen 2010. Evaluates Rayfract with synthetic data.
Building syncline model and forward modeling data described by Derecke Palmer in EAGE Geophysical Prospecting March 2010
Improving interpretation of syncline model
Comparison of pseudo-2D
Delta-t-V initial model with 1D-gradient initial model, for basement depression (syncline model) described by Derecke Palmer
Comparison of pseudo-2D
Delta-t-V initial model with 1D-gradient initial model, for basement depression model as described by Jacob Sheehan
Application of Seismic Refraction Tomography to Karst Cavities
(Jacob R. Sheehan et al. 2005, U.S. Geological Survey Scientific Investigations Report 2005-5160)
Interpretation of Jacob Sheehan's Epikarst model
Comparison of pseudo 2D
Delta-t-V initial model with 1D gradient initial model
Thrust fault modeling
and imaging with Surfer 8 and Rayfract 3.19
Improved interpretation
of "Dipping" SEG 2003 Dallas model (Jacob Sheehan et al.), with Delta-t-V version 2.47
Evaluation of refraction
tomography codes for near-surface applications (Jacob Sheehan et al., Oak Ridge National
Laboratory Tennessee, SEG 2003 Dallas abstract)
Comparison of shallow refraction interpretation methods for regolith mapping
(Robert J. Whiteley and Peter J. Eccleston, ASEG Exploration Geophysics Dec 2006 final draft)
Interpretation of First-Arrival Travel Times with Wavepath Eikonal Traveltime inversion and Wavefront refraction method (Rohdewald, SAGEEP 2011)
Tutorial how to build and use your own layer-based initial model
Wavepath eikonal traveltime inversion:
Theory (Gerard T. Schuster 1993)
Seismic traveltime tomography using Fresnel volume approach (Toshiki Watanabe 1999)
Beyond ray tomography: Wavepaths and Fresnel volumes (Don W. Vasco et al. 1995)
The Fresnel volume and transmitted waves (Jesper Spetzler and Roel Snieder 2004)
Local earthquake tomography between rays and waves: fat ray tomography (S. Husen and E. Kissling ETH Zurich 2001)
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