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Book Chapter

Raypath Traveltime Tomography

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Published:
January 01, 2017

Abstract

Raypath Traveltime Tomography: As discussed in Chapter 1, geophysical traveltime tomography is the procedure for inverting traveltimes of specified body waves for the velocity distribution of the earth. It has been the primary means for earthquake imaging of the Earth’s interior from the early 1970s. Until recently, it was implemented mostly using the high-frequency approximation of ray tracing, but there is a growing tendency to use finite-frequency tomography, in which traveltime residuals are back projected along wavepaths rather than raypaths. Finite-frequency wave-equation tomography, also known as wave-equation tomography or wave-equation traveltime tomography, can be more accurate than raypath tomography. However, it is at least an order of magnitude more costly because the wave equation must be solved numerically for each source. Traveltime tomography also is used in a variety of other fields, such as medical imaging, nondestructive evaluation, and meteorology.

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Contents

Society of Exploration Geophysicists

Seismic Inversion

Gerard T. Schuster
Gerard T. Schuster
Search for other works by this author on:
Society of Exploration Geophysicists
Volume
20
ISBN electronic:
9781560803423
Publication date:
January 01, 2017

GeoRef

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