Results 261 to 270 of about 48,466 (293)
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Shear-wave splitting observations on Milos, Greece
Geothermics, 1989Abstract Seismograms from local earthquakes recorded on Milos have been analysed for shear-wave splitting diagnostic of seismic anisotropy. Many complex P- and shear-wave trains were observed, indicating the presence of much heterogeneity, but shear-wave splitting was identified in most shear-wave arrivals within the shear-wave window.
D.C. Booth +4 more
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Shear Wave Splitting Analysis Using SKS Phase
Proceedings, 2018Summary Anisotropy is an intrinsic part of our real Earth and the simplified assumption of an isotropic subsurface is generally not satisfied. Seismic anisotropy is mostly indicated by splitting of shear waves. We have worked on two earthquake events from the Andaman and Nicobar Islands and performed anisotropic correction for the two events by ...
T. Dev, P. Kumar
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Shear wave splitting and subcontinental mantle deformation
Journal of Geophysical Research: Solid Earth, 1991We have made measurements of shear wave splitting in the phases SKS and SKKS at 21 broadband stations in North America, South America, Europe, Asia, and Africa. Measurements are made using a retrieval scheme that yields the azimuth of the fast polarization direction ϕ and delay time δt of the split shear wave plus uncertainties.
Paul G. Silver, W. Winston Chan
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A New Understanding of Shear-Wave Splitting
Proceedings, 1995Shear-wave splitting (shear-wave- bi-refringence) diagnostic of some form of azimuthal anisotropy is widely observed in all types of rock in the uppermost 15km of the Earth's crust (Crampin and Lovell 1991).
S. Crampin, S. V. Zatsepin
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Error in shear‐wave polarization and time splitting
Geophysical Prospecting, 2004ABSTRACTShear‐wave polarization and time delay are attributes commonly used for fracture detection and characterization. In time‐lapse analysis these parameters can be used as indicators of changes in the fracture orientation and density. Indeed, changes in fracture characteristics provide key information for increased reservoir characterization and ...
Gwénola Michaud, Roel Snieder
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Shear‐wave splitting in cross‐hole surveys: Modeling
GEOPHYSICS, 1989Shear‐wave splitting, diagnostic of some form of effective seismic anisotropy, is observed along almost all near‐vertical raypaths through the crust. The splitting is caused by propagation through distributions of stress‐aligned vertical parallel fluid‐filled cracks, microcracks, and preferentially oriented pore space that exist in most crustal rocks.
Enru Liu, Stuart Crampin, David C. Booth
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Evaluation of anisotropy by shear‐wave splitting
GEOPHYSICS, 1985The polarizations of three‐component shear wavetrains carry unique information about the internal structure of the rock through which they pass: specifically, commonly observed shear‐wave splitting may contain information about the orientation of crack distributions.
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Analysis of Shear-Wave Splitting
66th EAGE Conference & Exhibition, 2004K. Henneberg, J. Langhammer, T. Tvedt
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