Results 21 to 30 of about 2,042,519 (287)

Shear wave splitting and shear wave splitting tomography of the southern Puna plateau [PDF]

open access: yesGeophysical Journal International, 2014
Fil: Calixto, Frank J.. University of Missouri-Columbia.
Calixto, F.   +9 more
openaire   +4 more sources

Effects of Background Porosity on Seismic Anisotropy in Fractured Rocks: An Experimental Study

open access: yesApplied Sciences, 2023
Fractures are widely distributed in the subsurface and are crucial for hydrocarbon, CCS, offshore infrastructure (windfarms), and geothermal seismic surveys.
Yuangui Zhang   +3 more
doaj   +1 more source

Anisotropic structure of the Australian continent

open access: yesFrontiers in Earth Science, 2023
The Australian continent preserves some of the oldest lithosphere on Earth in the Yilgarn, Pilbara, and Gawler Cratons. In this study we present shear wave splitting and Ps receiver function results at long running stations across the continent.
Andrew Birkey   +2 more
doaj   +1 more source

Temporal variation of shear-wave splitting parameters before and after the 2008 Movri Mountain earthquake in northwest Peloponnese (Greece) [PDF]

open access: yes, 2013
On June 8, 2008, at 12:25 GMT, a Mw 6.4 earthquake, the Movri Mountain earthquake, occurred in the area of northwest Peloponnese, western Greece. The epicenter was located in the municipality of Movri, 35 km southwest of Patras. For this study, a crustal
Dimitrios Giannopoulos   +20 more
core   +2 more sources

Seismic anisotropy of the upper mantle beneath Thailand: Tectonic setting constrained by shear-wave splitting analysis [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2020
The tectonic setting of the lithosphere and upper mantle underneath Thailand varies and changes substantially over short distances. We have mapped these variations using shear wave splitting (SWS) analysis.
Wisawet Wongwai   +3 more
doaj   +1 more source

Shear‐wave splitting beneath the Galápagos archipelago [PDF]

open access: yesGeophysical Research Letters, 2005
Shear‐wave splitting measurements in the Galápagos archipelago show a rapid change from consistently oriented anisotropy to no measurable anisotropy. At the western edge of the archipelago delay times are 0.4–0.9 s and fast polarization directions are 81–109°E. These directions are consistent with anisotropy resulting from shear of the asthenosphere by
Fontaine, Fabrice R.   +5 more
openaire   +3 more sources

Diurnal expansion and contraction of englacial fracture networks revealed by seismic shear wave splitting

open access: yesCommunications Earth & Environment, 2021
Daily variations in seismic S-wave anisotropy reveal the dynamic response of englacial fractures to changing meltwater supply, according to shear wave splitting measurements from a seismometer network on the Rhonegletscher, Switzerland.
Wojciech Gajek   +4 more
doaj   +1 more source

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

Anisotropy, focal mechanisms, and state of stress in an oilfield : passive seismic monitoring in Oman [PDF]

open access: yes, 2005
Knowledge of the spatial characteristics of stress and fractures in reservoirs is important for optimising production and injection processes. Serni-permanent passive microseismic monitoring is being conducted in the Yibal field, Oman, to better ...
Al-Anboori, Abdullah Said
core   +5 more sources

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