Open AccessNon-linear arrival time tomography
Author(s) -
C. B. Papazachos,
Guust Nolet
Publication year - 1997
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-3937
Subject(s) - maxima and minima , algorithm , ray tracing (physics) , inversion (geology) , tomography , tracing , computer science , inverse problem , scaling , inverse theory , mathematics , mathematical optimization , mathematical analysis , geometry , geology , optics , physics , seismology , tectonics , operating system , telecommunications , surface wave
The use of 1D or pseudo- 3D ray tracing techniques in linearized tomographic problems leads to solutions for which it is difficult to assess the true resolution and error distribution. For this reason, we employ a revised 3D bending algorithm (Moser et al., 1992) and show that it can be used efficiently for a non-linear inversion in a stepwise scheme. Initial paths are determined from graph theory in order to avoid local minima in bending. The importance of 3D ray tracing in inversion studies and the limitations of the standard 1D approach are demonstrated through synthetic examples. The speed of the ray tracing and the simple scaling scheme allow for an implementation in large-scale tomographic problems