Seismic wavefront tracking in 3-D heterogeneous media: applications with multiple data classes

N. Rawlinson, M. de Kool, M. Sambridge

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We demonstrate the potential of a recently developed grid-based eikonal solver for tracking phases comprising reflection branches, transmission branches, or a combination of these, in 3D heterogeneous layered media. The scheme is based on a multi-stage fast marching approach that reinitialises the wavefront from each interface it encounters as either a reflection or transmission. The use of spherical coordinates allows wavefronts and traveltimes to be computed at local, regional, and semi-global scales. Traveltime datasets for a large variety of seismic experiments can be predicted, including reflection, wide-angle reflection and refraction, local earthquake, and teleseismic. A series of examples are presented to demonstrate potential applications of the method. These include: (1) tracking active and passive source wavefronts in the presence of a complex subduction zone; (2) earthquake hypocentre relocation in a laterally heterogeneous 3D medium; (3) joint inversion of wide-angle and teleseismic datasets for P-wave velocity structure in the crust and upper mantle. Results from these numerical experiments show that the new scheme is highly flexible, robust and efficient, a combination seldom found in either grid- or ray-based traveltime solvers. The ability to track arrivals for multiple data classes such as wide-angle and teleseismic is of particular importance, given the recent momentum in the seismic imaging community towards combining active and passive source datasets in a single tomographic inversion.
Original languageEnglish
Pages (from-to)322-330
Number of pages9
JournalExploration Geophysics
Volume37
Issue number4
DOIs
Publication statusPublished - 2006

Fingerprint

heterogeneous medium
earthquake hypocenter
layered medium
earthquakes
grids
inversions
relocation
velocity structure
refraction
subduction zone
P-wave
wave velocity
spherical coordinates
upper mantle
momentum
experiment
P waves
encounters
crust
arrivals

Cite this

Seismic wavefront tracking in 3-D heterogeneous media : applications with multiple data classes. / Rawlinson, N.; de Kool, M.; Sambridge, M.

In: Exploration Geophysics, Vol. 37, No. 4, 2006, p. 322-330.

Research output: Contribution to journalArticle

Rawlinson, N. ; de Kool, M. ; Sambridge, M. / Seismic wavefront tracking in 3-D heterogeneous media : applications with multiple data classes. In: Exploration Geophysics. 2006 ; Vol. 37, No. 4. pp. 322-330.
@article{6c51eb76cb58464ba734a3f6b79a2fd5,
title = "Seismic wavefront tracking in 3-D heterogeneous media: applications with multiple data classes",
abstract = "We demonstrate the potential of a recently developed grid-based eikonal solver for tracking phases comprising reflection branches, transmission branches, or a combination of these, in 3D heterogeneous layered media. The scheme is based on a multi-stage fast marching approach that reinitialises the wavefront from each interface it encounters as either a reflection or transmission. The use of spherical coordinates allows wavefronts and traveltimes to be computed at local, regional, and semi-global scales. Traveltime datasets for a large variety of seismic experiments can be predicted, including reflection, wide-angle reflection and refraction, local earthquake, and teleseismic. A series of examples are presented to demonstrate potential applications of the method. These include: (1) tracking active and passive source wavefronts in the presence of a complex subduction zone; (2) earthquake hypocentre relocation in a laterally heterogeneous 3D medium; (3) joint inversion of wide-angle and teleseismic datasets for P-wave velocity structure in the crust and upper mantle. Results from these numerical experiments show that the new scheme is highly flexible, robust and efficient, a combination seldom found in either grid- or ray-based traveltime solvers. The ability to track arrivals for multiple data classes such as wide-angle and teleseismic is of particular importance, given the recent momentum in the seismic imaging community towards combining active and passive source datasets in a single tomographic inversion.",
author = "N. Rawlinson and {de Kool}, M. and M. Sambridge",
year = "2006",
doi = "10.1071/EG06322",
language = "English",
volume = "37",
pages = "322--330",
journal = "Exploration Geophysics",
issn = "0812-3985",
publisher = "CSIRO",
number = "4",

}

TY - JOUR

T1 - Seismic wavefront tracking in 3-D heterogeneous media

T2 - applications with multiple data classes

AU - Rawlinson, N.

AU - de Kool, M.

AU - Sambridge, M.

PY - 2006

Y1 - 2006

N2 - We demonstrate the potential of a recently developed grid-based eikonal solver for tracking phases comprising reflection branches, transmission branches, or a combination of these, in 3D heterogeneous layered media. The scheme is based on a multi-stage fast marching approach that reinitialises the wavefront from each interface it encounters as either a reflection or transmission. The use of spherical coordinates allows wavefronts and traveltimes to be computed at local, regional, and semi-global scales. Traveltime datasets for a large variety of seismic experiments can be predicted, including reflection, wide-angle reflection and refraction, local earthquake, and teleseismic. A series of examples are presented to demonstrate potential applications of the method. These include: (1) tracking active and passive source wavefronts in the presence of a complex subduction zone; (2) earthquake hypocentre relocation in a laterally heterogeneous 3D medium; (3) joint inversion of wide-angle and teleseismic datasets for P-wave velocity structure in the crust and upper mantle. Results from these numerical experiments show that the new scheme is highly flexible, robust and efficient, a combination seldom found in either grid- or ray-based traveltime solvers. The ability to track arrivals for multiple data classes such as wide-angle and teleseismic is of particular importance, given the recent momentum in the seismic imaging community towards combining active and passive source datasets in a single tomographic inversion.

AB - We demonstrate the potential of a recently developed grid-based eikonal solver for tracking phases comprising reflection branches, transmission branches, or a combination of these, in 3D heterogeneous layered media. The scheme is based on a multi-stage fast marching approach that reinitialises the wavefront from each interface it encounters as either a reflection or transmission. The use of spherical coordinates allows wavefronts and traveltimes to be computed at local, regional, and semi-global scales. Traveltime datasets for a large variety of seismic experiments can be predicted, including reflection, wide-angle reflection and refraction, local earthquake, and teleseismic. A series of examples are presented to demonstrate potential applications of the method. These include: (1) tracking active and passive source wavefronts in the presence of a complex subduction zone; (2) earthquake hypocentre relocation in a laterally heterogeneous 3D medium; (3) joint inversion of wide-angle and teleseismic datasets for P-wave velocity structure in the crust and upper mantle. Results from these numerical experiments show that the new scheme is highly flexible, robust and efficient, a combination seldom found in either grid- or ray-based traveltime solvers. The ability to track arrivals for multiple data classes such as wide-angle and teleseismic is of particular importance, given the recent momentum in the seismic imaging community towards combining active and passive source datasets in a single tomographic inversion.

U2 - 10.1071/EG06322

DO - 10.1071/EG06322

M3 - Article

VL - 37

SP - 322

EP - 330

JO - Exploration Geophysics

JF - Exploration Geophysics

SN - 0812-3985

IS - 4

ER -