Results 81 to 90 of about 48,699 (196)

Mantle Structure and Flow Across the Continent‐Ocean Transition of the Eastern North American Margin: Anisotropic S‐Wave Tomography

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Little has been seismically imaged through the lithosphere and mantle at rifted margins across the continent‐ocean transition. A 2014–2015 community seismic experiment deployed broadband seismic instruments across the shoreline of the eastern North ...
Brennan R. Brunsvik   +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.
Eakin, Caroline M., Long, Maureen D.
core   +1 more source

SKS-wave splitting and upper mantle structure: results in the Southern Apennines

open access: yesAnnals of Geophysics, 1998
Shear wave splitting measures at six temporary stations in the Southern Apennines are computed analyzing fifteen events recorded during the spring and summer 1996, with magnitude greater than 5.8.
L. Margheriti
doaj   +1 more source

The Giant Flare of 1998 August 27 from SGR 1900+14: II. Radiative Mechanism and Physical Constraints on the Source

open access: yes, 2001
(ABBREVIATED) The extraordinary 1998 August 27 giant flare places strong constraints on the physical properties of its source, SGR 1900+14. We make detailed comparisons of the published data with the magnetar model.
Barat C.   +9 more
core   +1 more source

Shear Wave Splitting and Mantle Flow in Mexico: What Have we Learned?

open access: yesGeofísica Internacional, 2017
El presente artículo es un resumen y análisis de los estudios de partición de ondas transversales (shear wave splitting) para el manto superior que se han realizado en México durante la última década.
Raúl Valenzuela Wong   +1 more
doaj   +1 more source

Shear‐wave splitting in the Rio Grande Rift

open access: yesGeophysical Research Letters, 1992
Fast directions and lag times associated with SKS shear‐wave splitting are determined for six digital stations in the Rio Grande Rift (RGR). The mean fast direction for three stations in the central RGR is about 45° oblique to the axis of the RGR. In contrast, fast directions approximately parallel to the axis of the RGR are found for two stations in ...
Eric Sandvol   +3 more
openaire   +1 more source

Van Hove Exciton-Cageons and High-T$_c$ Superconductivity: VIIID Solitons and Nonlinear Dynamics

open access: yes, 1993
The low-temperature orthorhombic (LTO) phase transition in La$_{2-x}$Sr$_x$CuO$_4$ can be interpreted as a dynamic Jahn-Teller effect, in which the degenerate electronic states are associated with the large densities of states at the two van Hove ...
Axe   +42 more
core   +2 more sources

Gravitational-wave implications for structure formation: A second-order approach

open access: yes, 2016
Gravitational waves are propagating undulations in the spacetime fabric, which interact very weakly with their environment. In cosmology, gravitational-wave distortions are produced by most of the inflationary scenarios and their anticipated detection ...
Pazouli, Despoina, Tsagas, Christos G.
core   +1 more source

Variations of shear-wave splitting parameters in the source region of the 2023 Türkiye doublet earthquakesKey points

open access: yesEarthquake Science
In this study, the shear-wave splitting parameters of local seismic events from the source regions of the 2023 Türkiye MW7.7 and MW7.6 doublet earthquakes (event 1 and event 2, respectively) were measured from June 1, 2022, to April 25, 2023, and their ...
Xuelai Cao, Lijun Chang
doaj   +1 more source

Shear-Wave Splitting in a Critical Crust: the Next Step Biréfringence des ondes transversales dans les croûtes critiques : la prochaine étape

open access: yesOil & Gas Science and Technology, 2006
Arguably, shear-wave splitting displaying azimuthal anisotropy has not lived up to its initial promise of opening a new window for understanding cracks and stress in the crust.
Crampin S.
doaj   +1 more source

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