Results 261 to 270 of about 48,800 (293)

Shear-wave splitting observations on Milos, Greece

Geothermics, 1989
Abstract 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, S. Schleper, S. Crampin, N. Ochmann, J. Wohlenberg   +4 more
openaire   +1 more source

Implications of temporal changes in shear‐wave splitting

SEG Technical Program Expanded Abstracts 1988, 1988
Details of the behaviour of shear-wave splitting have been observed to change before and after earthquakes and before and after hydraulic fracturing. The observations before earthquakes can be interpreted as the increasing aspect ratio (dilatation) of stress-aligned EDA-cracks, and the return to thin cracks after the earthquake has released the stress.
openaire   +1 more source

Making Reliable Shear-Wave Splitting Measurements

Bulletin of the Seismological Society of America, 2013
Shear-wave splitting (SWS) analysis using SKS, SKKS, and PKS (here- after collectively called XKS) phases is one of the most commonly used techniques in structural seismology. In spite of the apparent simplicity in performing SWS measure- ments, large discrepancies in published SWS parameters (fast direction and splitting time) suggest that a ...
K. H. Liu, S. S. Gao
openaire   +1 more source

On shear-wave splitting in the Los Angeles basin

pure and applied geophysics, 1990
Three-component seismograms at the three USC stations, PVP, GFP and DHB, have been examined. Most earthquakes, with magnitudes ranging from 1.4 to 5.0, within a period from 1985 to 1988, show evidence of shear-wave splitting. The preferred polarization of the first split-shear wave arrivals at PVP is nearly in N-S which is consistent with both regional
openaire   +1 more source

A physical model study of shear wave splitting and fracture intensity

SEG Technical Program Expanded Abstracts 1987, 1987
Abstract In a series of physical model experiments, fractured media are simulated by stacks of thin Plexiglas sheets clamped together tightly to form blocks. The plates are assembled underwater, and a very thin water layer between the sheets prevents formation of an effectively welded interface between them. Thus, the stacked material
Robert H. Tatham, Martin D. Matthews, K. K. Sekharan, Christopher J. Wade, Louis M. Liro   +4 more
openaire   +1 more source

Shear wave splitting and subcontinental mantle deformation

Journal of Geophysical Research: Solid Earth, 1991
We 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
openaire   +1 more source

Shear-wave splitting in the Rajasthan craton, India

Journal of Asian Earth Sciences, 2019
Abstract The shear-wave splitting parameters (i.e. fast axes orientation (ψ) and delay time (δt)) are measured at four broadband stations in Rajasthan, using SKS/SKKS core phases from three-component broadband waveforms of 30 events recorded during 2014–16.
openaire   +1 more source

Analysis of Shear-Wave Splitting

66th EAGE Conference & Exhibition, 2004
K. Henneberg, J. Langhammer, T. Tvedt
openaire   +1 more source

Shear-wave splitting in a critical crust

Journal of Applied Geophysics, 2003
Stuart Crampin, Sebastien Chastin, Yuan Gao   +2 more
openaire   +1 more source

16. Inversion for Shear-Wave Splitting

1996
Steve Horne, Colin MacBeth, John Queen
openaire   +1 more source