Near-field influence on shear wave splitting and traveltime sensitivity kernels
نویسندگان
چکیده
منابع مشابه
Computing traveltime and amplitude sensitivity kernels in finite-frequency tomography
The efficient computation of finite-frequency traveltime and amplitude sensitivity kernels for velocity and attenuation perturbations in global seismic tomography poses problems both of numerical precision and of validity of the paraxial approximation used. We investigate these aspects, using a local model parameterization in the form of a tetrahedral grid with linear interpolation in between g...
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Estimating an accurate velocity function is one of the most critical steps in building an accurate seismic depth image of the subsurface. In areas with significant structural complexity, one-dimensional updating schemes become unstable, and more robust algorithms are needed. Reflection tomography both in the premigrated (Bishop et al., 1985) and postmigrated domains (Stork, 1992; Kosloff et al....
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G JI S ei sm ol og y Wave-equation shear wave splitting tomography Maureen D. Long,1,∗ Maarten V. de Hoop2 and Robert D. van der Hilst1 1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA. E-mail: [email protected] 2Center for Computational and Applied Mathematics, Purdue University, 150 N. University...
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Shear-wave splitting (SWS) analysis using SKS, SKKS, and PKS (hereafter collectively called XKS) phases is one of the most commonly used techniques in structural seismology. In spite of the apparent simplicity in performing SWS measurements, large discrepancies in published SWS parameters (fast direction and splitting time) suggest that a significant portion of splitting parameters has been inc...
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Shear-wave splitting measurements are widely used to analyze orientations of anisotropy. We compare two different shear-wave splitting techniques, which are generally assumed to give similar results. Using a synthetic test, which covers the whole backazimuthal range, we find characteristic differences, however, in fast-axis and delay-time estimates near Null directions between the rotation corr...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2004
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2004.02178.x