Results 271 to 280 of about 164,377 (321)

Vertical coherence of deformation in lithosphere in the NE margin of the Tibetan plateau using GPS and shear-wave splitting data

Tectonophysics, 2017
L. Chang, Z. Ding, Chun-yong Wang, L. Flesch   +3 more
semanticscholar   +3 more sources

Constraining Ice Shelf Anisotropy Using Shear Wave Splitting Measurements from Active‐Source Borehole Seismics

Journal of Geophysical Research: Earth Surface, 2020
Observations of ice shelf anisotropy on borehole seismic data are presented. Hot‐water‐drilledboreholes were made by the Aotearoa New Zealand Ross Ice Shelf Programme through a grounding‐line proximal site at Windless Bight and the central Ross Ice Shelf
Franz Lutz, J. Eccles, D. Prior, L. Craw, Sheng Fan, C. Hulbe, M. Forbes, Holly Still, A. Pyne, Darcy Mandeno   +9 more
semanticscholar   +1 more source

Bootstrapping shear-wave splitting errors

Bulletin of the Seismological Society of America, 1994
Abstract We have developed a bootstrap method to estimate errors associated with inverting SKS waveforms for shear-wave splitting parameters. Although presented for shear-wave splitting inversions, this method is suitable for any waveform inversion procedure.
Eric Sandvol, Thomas Hearn
openaire   +1 more source

Null Detection in Shear-Wave Splitting Measurements

Bulletin of the Seismological Society of America, 2007
Shear-wave splitting measurements are widely used to analyze orien- tations of anisotropy. We compare two different shear-wave splitting techniques, which are generally assumed to give similar results. Using a synthetic test, which covers the whole backazimuthal range, we find characteristic differences, however, in fast-axis and delay-time estimates ...
Wüstefeld, A, Bokelmann, G
openaire   +2 more sources

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

Thin layers and shear‐wave splitting

GEOPHYSICS, 1991
The near‐surface weathering layer is considered by many to be strongly anisotropic. Any shear‐wave signal passing through this low‐velocity layer will inherit, to some degree, the anisotropic response of this layer. For thin weathering layers, information about previous anisotropic events may be distorted; when the thickness of this layer approaches ...
R. D. Slack, D. A. Ebrom, J. A. McDonald, R. H. Tatham   +3 more
openaire   +1 more source

Teleseismic shear-wave splitting in SE Tibet: Insight into complex crust and upper-mantle deformation

Earth and Planetary Science Letters, 2015
Zhouchuan Huang, Liangshu Wang, Mingjie Xu, Z. Ding, Yan Wu, Pan Wang, N. Mi, Dayong Yu, Hua Li   +8 more
semanticscholar   +3 more sources

Complex Lithospheric Deformation in Eastern and Northeastern Tibet From Shear Wave Splitting Observations and Its Geodynamic Implications

Journal of Geophysical Research: Solid Earth, 2019
The eastern and northeastern Tibetan Plateau is a key region to study the growth and expansion of the plateau and associated extrusion tectonics. We studied the seismic anisotropic structure in this region by shear wave splitting analysis of teleseismic ...
Yifan Gao, Ling Chen, Xu Wang, Y. Ai
semanticscholar   +1 more source

Shear-wave splitting near Guam

Physics of the Earth and Planetary Interiors, 1992
Abstract Polarities of shear waves from intermediate-focus events underneath Guam are studied. For records from a group of ten events, shear-wave splitting with faster-arriving E-W components are observed. This event group occurred within, or above, one geographic portion of the Wadati-Benioff zone, with depths ranging between 57 and 148 km.
openaire   +1 more source

Shear-wave splitting in compliant rocks

The Leading Edge, 2010
Shear-wave splitting is a phenomenon that has received a lot of attention primarily because of its connection with vertically aligned cracks or fractures within reservoirs. However, in most cases the largest amount of shear-wave splitting is observed to occur in the near-surface layers where the rocks are the least consolidated, and so are least likely
Peter Cary, Xinxiang Li, Gulia Popov, Changjun Zhang   +3 more
openaire   +1 more source