Dynamic ray tracing and traveltime corrections for global seismic tomography
Resource
Journal of Computational Physics 226 (1): 672-687
Journal
Journal of Computational Physics
Pages
672-687
Date Issued
2007
Date
2007
Author(s)
Abstract
We present a dynamic ray tracing program for a spherically symmetric Earth that may be used to compute Fréchet kernels for traveltime and amplitude anomalies at finite frequency. The program works for arbitrarily defined phases and background models. The numerical precisions of kinematic and dynamic ray tracing are optimized to produce traveltime errors under 0.1 s, which is well below the data uncertainty in global seismology. This tolerance level is obtained for an integration step size of about 20 km for the most common seismic phases. We also give software to compute ellipticity, crustal and topographic corrections and attenuation. © 2007 Elsevier Inc. All rights reserved.
Type
journal article
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