Results 281 to 290 of about 164,377 (321)

Upper‐Crustal Anisotropy of the Conjugate Strike‐Slip Fault Zone in Central Tibet Analyzed Using Local Earthquakes and Shear‐Wave Splitting

Bulletin of The Seismological Society of America (BSSA), 2019
Remarkable V‐shaped conjugate strike‐slip faults extend along the Bangong–Nujiang suture in central Tibet. Motions of these faults are considered to accommodate ongoing east–west extension and north–south contraction. Fabrics within the fault zone that
Chenglong Wu, Xiaobo Tian, T. Xu, Xiaofeng Liang, Yun Chen, G. Zhu, J. Badal, Z. Bai, Guiping Yu, J. Teng   +9 more
semanticscholar   +1 more source

Shear Wave Splitting in Himalaya

Chinese Journal of Geophysics, 2007
AbstractWe analyze the records of 56 stations in Himalaya area with the method of minimizing the eigenvalue. Splitting was observed at thirty‐nine stations of them. The average splitting time is about 0.8s. The parameters of splitting vary not only from south to north, but are also different on the two sides of the line joining the station GAIG and ...
openaire   +1 more source

Detecting false indications of shear‐wave splitting

SEG Technical Program Expanded Abstracts 2002, 2002
Summary Observations of shear-wave splitting from converted-wave seismic surveys are becoming common. When interpreting 3-C data for shear-wave splitting, it is important to be able to distinguish true indicators of shear-wave splitting from false ones.
Bruno Gratacos, Richard Bale, Pierre‐Yves Granger   +2 more
openaire   +2 more sources

Observations of shear-wave splitting parameters in the Western Gulf of Corinth focusing on the 2014 Mw = 5.0 earthquake

Physics of the Earth and Planetary Interiors, 2018
The Western Gulf of Corinth, located in Central Greece, is an active neotectonic graben that features intense seismicity. Events recorded by dense local networks during 2014 (including those belonging to an offshore swarm between Nafpaktos and ...
G. Kaviris, Christos Millas, I. Spingos, V. Kapetanidis, I. Fountoulakis, P. Papadimitriou, N. Voulgaris, K. Makropoulos   +7 more
semanticscholar   +1 more source

A Database of Shear‐Wave Splitting Measurements for the Arabian Plate

Seismological Research Letters, 2018
We present a uniform database of teleseismic shear-wave splitting (SWS) parameters for the Arabian plate. The SWS parameters, including the fast polarization orientation and splitting time, are measured based on a procedure that minimizes the energy on ...
S. Qaysi, Kelly H. Liu, Stephen S. Gao
semanticscholar   +1 more source

Azimuthal anisotropy and mantle flow underneath the southeastern Tibetan Plateau and northern Indochina Peninsula revealed by shear wave splitting analyses

Tectonophysics, 2018
Seismic azimuthal anisotropy beneath the transitional region between the southeastern Tibetan Plateau and the Indochina Peninsula, an area in which the fast orientation of mantle anisotropy changes to dominantly E-W from mostly N-S on the plateau at the ...
F. Kong, Jing Wu, Lin Liu, Kelly H. Liu, Jian-Li Song, Jiabiao Li, Stephen S. Gao   +6 more
semanticscholar   +1 more source

Measuring Shear-wave Splitting Using Seismic Anisotropy

Proceedings, 2014
In this study, we investigate the feasibility of using microseismic data to invert for fracture density, fracture strike and fracture compliance ratio from shear splitting results. We simulate microseismic waveforms by propagating a moment tensor point source disturbance in a heterogeneous isotropic media using a finite difference program.
Yousef, B. M., Angus, D. A., Hildyard, M. W., Verdon, J. P., Perry, M.   +4 more
openaire   +1 more source

Estimating interval shear‐wave splitting from multicomponent virtual shear checkshots

SEG Technical Program Expanded Abstracts 2008, 2008
Measuring shear-wave splitting from vertical seismic profiling (VSP) data can benefit fracture and stress characterization as well as seismic processing and interpretation. The classic approach to measuring azimuthal anisotropy at depth involves layer stripping.
Andrey Bakulin, Albena Mateeva
openaire   +2 more sources

Multichannel analysis of shear wave splitting

Journal of Geophysical Research: Solid Earth, 2000
A multichannel analysis is introduced to constrain seismic anisotropy from the shear wave splitting of SKS and SKKS. This technique utilizes simultaneously a set of records coming from different azimuths. The splitting intensity of SKS waves, measured by the amplitude of the transverse component, depends on the angle between the back azimuth of the ...
openaire   +1 more source

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