Results 181 to 190 of about 27,412 (233)
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GEOPHYSICS, 2001
The topic of seismic anisotropy in exploration and exploitation has seen a great deal of progress in the past decade‐and‐a‐half. The principal reason for this is the increased (and increasing) quality of seismic data, of the processing done to it, and of the interpretation expected from it. No longer an academic subject of little practical interest, it
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The topic of seismic anisotropy in exploration and exploitation has seen a great deal of progress in the past decade‐and‐a‐half. The principal reason for this is the increased (and increasing) quality of seismic data, of the processing done to it, and of the interpretation expected from it. No longer an academic subject of little practical interest, it
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Seismic anisotropy beneath Southern Tibet
Acta Seismologica Sinica, 1996We have examined shear-wave splitting in teleseismic waves (SKS) recorded on 20 seismographs deployed on a profile that followed the Southern Tibet highway during the 1992 Sino-French seismic experiment. The “cross-correlation” method is applied to derive splitting parameters.
Qing-Tian Lü +4 more
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Geophysical Prospecting, 2005
ABSTRACTShales are a major component of sedimentary basins, and they play a decisive role in fluid flow and seismic‐wave propagation because of their low permeability and anisotropic microstructure. Shale anisotropy needs to be quantified to obtain reliable information on reservoir fluid, lithology and pore pressure from seismic data, and to understand
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ABSTRACTShales are a major component of sedimentary basins, and they play a decisive role in fluid flow and seismic‐wave propagation because of their low permeability and anisotropic microstructure. Shale anisotropy needs to be quantified to obtain reliable information on reservoir fluid, lithology and pore pressure from seismic data, and to understand
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Seismic anisotropy of a building
The Leading Edge, 2006The Robert A. Millikan Library is a reinforced concrete building located on the campus of the California Institute for Technology in Pasadena, USA. The building has been studied by earthquake engineers since it was first instrumented in the late 1960s. Continuous measurements at 200 Hz are made by 19-bit real-time seismometers on each of the 10 floors ...
David Thompson, Roel Snieder
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2007
The main breakthrough in seismology during the last ten years is related to the emergence and development of more and more sophisticated 3-dimensional imaging techniques, usually named seismic tomography, from the local scale up to global scale of the Earth.
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The main breakthrough in seismology during the last ten years is related to the emergence and development of more and more sophisticated 3-dimensional imaging techniques, usually named seismic tomography, from the local scale up to global scale of the Earth.
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Observations of seismic anisotropy in prestack seismic data
SEG Technical Program Expanded Abstracts 2007, 2007A method for displaying prestack seismic data that highlights azimuthal anisotropy is shown. Using this method to make observations of azimuthal anisotropy in prestack seismic data makes it clear that azimuthal anisotropy is observed in all types of seismic data and that it is widespread from the shallowest to the deepest seismic reflectors. Therefore,
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2002
This chapter focuses on seismological aspects of seismic anisotropy. It presents results that link the observations of seismic anisotropy to dynamic processes acting in the Earth. Evidence for seismic anisotropy come either from local variation of seismic velocities with respect to the direction of propagation, or from anomalies linked with their ...
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This chapter focuses on seismological aspects of seismic anisotropy. It presents results that link the observations of seismic anisotropy to dynamic processes acting in the Earth. Evidence for seismic anisotropy come either from local variation of seismic velocities with respect to the direction of propagation, or from anomalies linked with their ...
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Mantle dynamics and seismic anisotropy
Earth and Planetary Science Letters, 2010Abstract Observations of seismic anisotropy yield some of the most direct constraints available on both past and present-day deformation in the Earth's mantle. Insight into the character of mantle flow can also be gained from the geodynamical modeling of mantle processes on both global and regional scales.
Maureen D. Long, Thorsten W. Becker
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Seismic Anisotropy from 6C Observations
2023A new approach is proposed for measuring the local dispersion curves of surface waves in weakly anisotropic media using a single, multi-component station, which consists of translation and rotation or strain. We directly extract the local azimuth-dependent phase velocity of the Rayleigh wave from the 6C amplitude ratio using seismic arrays deployed in ...
Le Tang +2 more
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Petrological constraints on seismic anisotropy
Physics of the Earth and Planetary Interiors, 1989The purpose of this paper is to investigate the correlations between anisotropic parameters for different orientations and mineralogies for realistic mineralogical and petrological models of the upper mantle. Such correlations make it possible to reduce the number of independent parameters required in seismic modelling of the upper mantle.
Montagner, Jean-Paul, Anderson, Don L.
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