Results 31 to 40 of about 2,203,308 (287)

Automated shear-wave splitting analysis for single- and multi- layer anisotropic media

open access: yesSeismica, 2023
Shear-wave velocity anisotropy is present throughout the earth. The strength and orientation of anisotropy can be observed by shear-wave splitting (birefringence) accumulated between earthquake sources and receivers. Seismic deployments are getting ever
Thomas Samuel Hudson   +2 more
doaj   +1 more source

Chiral-Nematic Lattice Instability in Charge Density Wave of 1T-TiSe<sub>2</sub>. [PDF]

open access: yesAdv Sci (Weinh)
The charge density wave of 1T‐TiSe2 appears chiral to surface probes yet loses all symmetry in spectroscopic measurements. This study reveals how cooperative condensation of multiple phonon modes stabilizes a chiral monoclinic ground state, while a shallow nematic energy landscape allows the lattice to break the remaining symmetry at negligible cost ...
Alghifari AA, Do E, Park JW, Yeom HW.
europepmc   +2 more sources

Experimental observation of water saturation effects on shear wave splitting in synthetic rock with fractures aligned at oblique angles [PDF]

open access: yes, 2015
Fractured rocks are known to exhibit seismic anisotropy and shear wave splitting (SWS). SWS is commonly used for fractured rock characterization and has been shown to be sensitive to fluid type. The presence of partial liquid/gas saturation is also known
Sothcott, J.   +7 more
core   +1 more source

Stress-dependent shear wave splitting and permeability in fractured porous rock

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2019
It is well known that shear wave propagates slower across than parallel to a fracture, and as a result, a travelling shear wave splits into two directions when it encounters a fracture.
Daisuke Katsuki   +2 more
doaj   +1 more source

Complex anisotropy beneath the Peruvian flat slab from frequency-dependent, multiple-phase shear wave splitting analysis [PDF]

open access: yes, 2013
Flat or shallow subduction is a relatively widespread global occurrence, but the dynamics remain poorly understood. In particular, the interaction between flat slabs and the surrounding mantle flow has yet to be studied in detail.
Long, Maureen D., Eakin, Caroline M.
core   +1 more source

Shear-wave splitting in the mantle of the pacific [PDF]

open access: yesGeophysical Journal International, 1994
SUMMARY The bulk of previously known data on seismic anisotropy in the suboceanic mantle was obtained from observations of azimuthal variations of the surface-wave and P, velocities. Our study of azimuthal anisotropy in the mantle of the Pacific is based on observations of shear-wave splitting. The idea of our method of measurement (Vinnik & Farra 1992)
Véronique Farra, Lev Vinnik
openaire   +1 more source

Observations of stress relaxation before earthquakes [PDF]

open access: yes, 2004
Theory and observations suggest that seismic shear wave splitting, caused by fluid-saturated stress-aligned microcracks, directly monitors low-level deformation before fracturing, faulting and earthquakes occur.
Gao, Yuan, Crampin, Stuart
core   +1 more source

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

open access: yesEarthquake 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

Shear wave splitting data set - Los Humeros Geothermal Field

open access: yes, 2021
Anisotropic data set, used in the analysis of the article "Analysis of shear wave splitting parameters in Los Humeros Geothermal Field, Puebla ...
Chacon Hernandez, F (via Mendeley Data)   +1 more
core   +1 more source

Upper crustal anisotropy from local shear-wave splitting and crust-mantle coupling of Yunnan, SE margin of Tibetan Plateau

open access: yesGeodesy and Geodynamics, 2018
The upper crustal anisotropy of Yunnan area, SE margin of Tibetan Plateau, is investigated by measuring the shear wave splitting of local earthquakes.
Bo Zhang   +3 more
doaj   +1 more source

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