Seismic traveltime tomography using Fresnel volume approach

Watanabe, Toshiki; Matsuoka, Toshifumi; Ashida, Yuzuru

doi:10.1190/1.1820777

Cited by 52 publications

(46 citation statements)

References 8 publications

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“…The inversion algorithm uses the Fresnel volume approach (Watanabe et al, 1999) which is an alternative to the raypath approach used by most inversion schemes. A Fresnel volume (Fig.…”

Section: Analysis Techniquesmentioning

confidence: 99%

An Evaluation of Methods and Available Software for Seismic Refraction Tomography Analysis

Sheehan

Doll

Mandell

2005

JEEG

144

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Seismic refraction tomography is an alternative to conventional seismic refraction analysis methods. While the limitations and potential pitfalls of conventional refraction methods are wellknown the same is not true for refraction tomography. As refraction tomography becomes more widely used, the need to know and understand its capabilities as well as its limitations becomes more critical. In this study we created eight representative models for use in evaluating three commercially available codes as well as refraction tomography in general. These models range from simple two-layer or dipping-layer problems to more complicated models designed to represent features of karst terrains. We demonstrate quantitatively and qualitatively that all three codes perform at a similar level, although each has strengths and weaknesses. Refraction tomography performs well in many situations where conventional methods fail, e.g., where lateral or vertical gradients compose a significant component of the velocity structure.

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“…The inversion algorithm uses the Fresnel volume approach (Watanabe et al, 1999) which is an alternative to the raypath approach used by most inversion schemes. A Fresnel volume (Fig.…”

Section: Analysis Techniquesmentioning

confidence: 99%

An Evaluation of Methods and Available Software for Seismic Refraction Tomography Analysis

Sheehan

Doll

Mandell

2005

JEEG

144

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“…Rayfract implements Wavepath Eikonal Traveltime tomography (WET) [14] with the Fresnel volume approach to inversion [15]. The WET inversion method is founded upon a backprojection formula for inverting velocities from travel times computed by a finite-difference solution to the Eikonal equation [16].…”

Section: Methodsmentioning

confidence: 99%

Comparing Models GRM, Refraction Tomography and Neural Network to Analyze Shallow Landslide

Sompotan¹,

Pasasa²,

Sule³

2011

itbj.eng.sci.

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Abstract. Detailed investigations of landslides are essential to understand fundamental landslide mechanisms. Seismic refraction method has been proven as a useful geophysical tool for investigating shallow landslides. The objective of this study is to introduce a new workflow using neural network in analyzing seismic refraction data and to compare the result with some methods; that are general reciprocal method (GRM) and refraction tomography. The GRM is effective when the velocity structure is relatively simple and refractors are gently dipping. Refraction tomography is capable of modeling the complex velocity structures of landslides. Neural network is found to be more potential in application especially in time consuming and complicated numerical methods. Neural network seem to have the ability to establish a relationship between an input and output space for mapping seismic velocity. Therefore, we made a preliminary attempt to evaluate the applicability of neural network to determine velocity and elevation of subsurface synthetic models corresponding to arrival times. The training and testing process of the neural network is successfully accomplished using the synthetic data. Furthermore, we evaluated the neural network using observed data. The result of the evaluation indicates that the neural network can compute velocity and elevation corresponding to arrival times. The similarity of those models shows the success of neural network as a new alternative in seismic refraction data interpretation.

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“…These techniques can broadly be grouped into the following four categories: (1) intercept−time method (Adachi 1954;Barton and Barker 2003;Hales 1958;Hagedoorn 1959), (2) reciprocal or delay-time method (Leung 1995(Leung , 1997(Leung , 2003Palmer 1980;Wyrobek 1956;Sjogren 2000) and (3) ray-tracing method (Jones and Jovanovich 1985;Whiteley 2002Whiteley , 2004, (4) inversion and tomography method (Boschetti et al 1996;Hecht 2003;Hofmann and Schrott 2003;Roach 2003;Schuster and Quintus-Bosz 1993;Sheehan et al 2005;Watanabe et al 1999;Wright 2006;Zhang and Toksöz 1998). Intercept−time methods can be done with a pencil and calculator or, at most, a spread sheet program.…”

Section: Refraction Analysis and Interpretationmentioning

confidence: 99%

Near-surface seismic refraction applied to exploring subsurface clay layer at a new mining area in southeast Cairo, Egypt

el-aal

Mohamed

2009

Arab J Geosci

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A near-surface seismic refraction survey was conducted at a new mining area located in southeast Cairo, Egypt, to explore the subsurface clay layer for future economic use in mining and cement industry. The purpose of the survey has been to provide geological and geophysical information because no borehole was existent in the area under investigation. The aim of study had been to explain the main characteristics of the subsurface layers. For this purpose, a new technique has been used to acquire and process the data. This technique provides critical information to determine the depth of the subsurface layers, as well as morphology, stratigraphy, and potential locations of the clay layer for future economic use. The thickness and general shape of the clay layer in the whole area were determined and are illustrated in maps.

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Seismic traveltime tomography using Fresnel volume approach

Cited by 52 publications

References 8 publications

An Evaluation of Methods and Available Software for Seismic Refraction Tomography Analysis

An Evaluation of Methods and Available Software for Seismic Refraction Tomography Analysis

Comparing Models GRM, Refraction Tomography and Neural Network to Analyze Shallow Landslide

Near-surface seismic refraction applied to exploring subsurface clay layer at a new mining area in southeast Cairo, Egypt

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