Results 21 to 30 of about 376,500 (336)

Finite-frequency sensitivity of body waves to anisotropy based upon adjoint methods [PDF]

, 2007
We investigate the sensitivity of finite-frequency body-wave observables to mantle anisotropy based upon kernels calculated by combining adjoint methods and spectral-element modelling of seismic wave propagation.
Liu, Qinya, Sieminski, Anne, Trampert, Jeannot, Tromp, Jeroen   +3 more
core   +1 more source

Wave speeds and Green’s tensors for shear wave propagation in incompressible, hyperelastic materials with uniaxial stretch [PDF]

, 2019
Assessing elastic material properties from shear wave propagation following an acoustic radiation force impulse (ARFI) excitation is difficult in anisotropic materials because of the complex relations among the propagation direction, shear wave ...
Caenen, Annette, Nightingale, Kathryn R., Rouze, Ned C.   +2 more
core   +1 more source

Mid-mantle deformation inferred from seismic anisotropy [PDF]

, 2002
With time, convective processes in the Earth's mantle will tend to align crystals, grains and inclusions. This mantle fabric is detectable seismologically, as it produces an anisotropy in material properties—in particular, a directional dependence in ...
A Yeganeh-Haeri, AE Ringwood, AR Oganov, C Tong, CJ Wolfe, CP Meade, D Mainprice, DL Anderson, G Barruol, G Clitheroe, Guilhem Barruol, J-M Kendall, J-M Kendall, J-P Montagner, J-P Montagner, J.-Michael Kendall, James Wookey, JB Gaherty, JX Mitrovica, K Fischer, K Hirose, L Stixrude, LP Vinnik, LP Vinnik, MJ Fouch, MK Savage, NJ Kusznir, PG Silver, PG Silver, R Van der Hilst, S Karato, S Karato, S Widiyantoro, S Özalaybey, SH Kirby   +34 more
core   +4 more sources

High temperature elastic anisotropy of the perovskite and post-perovskite polymorphs of Al2O3 [PDF]

, 2005
Finite temperature ab initio molecular dynamics calculations were performed to determine the high temperature elastic and seismic properties of the perovskite and post-perovskite phases of pure end-member Al2O3.
Brodholt, JP, Price, GD, Stackhouse, S
core   +1 more source

Identifying global seismic anisotropy patterns by correlating shear-wave splitting and surface-wave data [PDF]

, 2009
International audienceWe compare a global compilation of shear-wave splitting measurements with azimuthal seismic anisotropy parameters inferred from surface-wave tomography.
Barruol, Guilhem, Bokelmann, Goetz, Montagner, Jean-Paul, Wuestefeld, Andreas   +3 more
core   +6 more sources

Seismic anisotropy beneath the Chinese Mainland: Constraints from shear wave splitting analyses

Earthquake Research Advances, 2021
We use earthquakes recorded by the China National Seismic Network from 2015 to 2019 and measure shear wave splitting parameters of SKS to study the anisotropic characteristics beneath the mainland of China.
Lingxia Gao, Daoyuan Sun
doaj   +1 more source

Comment on “SKS splitting beneath continental rifts zones” by Gao et al. [PDF]

, 1999
International audienceAs previously suggested by many authors, shear wave splitting rneasurernents certainly provide the best insights on the tectonic structure (or fabric) of the upper mantle.
Achauer, Adolphe Nicolas, Alain Vauchez, Avé-Lallemant, Babuska, Barruol, Barruol, Boudier, Boudier, Chopra, Gao, Guilhem Barruol, Hearn, Ji, Kern, Mainprice, Mainprice, Mercier, Montagner, Nicolas, Nicolas, Nicolas, Nicolas, Nicolas, Shackleton, Silver, Silver, Smith, Sénéchal, Ufimtsev, Vauchez, Vauchez, Vauchez, Vinnik, Zhang   +34 more
core   +2 more sources

Deriving micro- to macro-scale seismic velocities from ice-core c axis orientations [PDF]

The Cryosphere, 2018
One of the great challenges in glaciology is the ability to estimate the bulk ice anisotropy in ice sheets and glaciers, which is needed to improve our understanding of ice-sheet dynamics.
J. Kerch, J. Kerch, A. Diez, I. Weikusat, I. Weikusat, O. Eisen, O. Eisen   +6 more
doaj   +1 more source

Characteristics Analysis of Three-Component Wave Field Based on Borehole Microseismic Data of Shear Wave Splitting

Cejing jishu, 2023
The wave field data which is monitored the fracturing crack by micro seismic in the well is complex, especially when the shear wave (S-wave) encounters the fracture. The shear wave will split into the fast or slow wave. The polarization directions of the
WEN Rou, LI Dong, HUANG Ke, WANG Xiyu, LU Yanping, FENG Shuchao   +5 more
doaj   +1 more source

Shear Wave Splitting and Mantle Flow Beneath Alaska

Journal of Geophysical Research: Solid Earth, 2020
Shear wave splitting is often assumed to be caused by mantle flow or preexisting lithospheric fabrics. We present 2,389 new SKS shear wave splitting observations from 384 broadband stations deployed in Alaska from January 2010 to August 2017.
A. McPherson, D. Christensen, G. Abers, C. Tape   +3 more
semanticscholar   +1 more source