scholarly journals A uniform database of teleseismic shear wave splitting measurements for the western and central United States

2014 ◽  
Vol 15 (5) ◽  
pp. 2075-2085 ◽  
Author(s):  
Kelly H. Liu ◽  
Ahmed Elsheikh ◽  
Awad Lemnifi ◽  
Uranbaigal Purevsuren ◽  
Melissa Ray ◽  
...  
Keyword(s):  
United States ◽  
Shear Wave ◽  
Shear Wave Splitting ◽  
Wave Splitting ◽  
Central United States

scholarly journals Characteristics of mantle fabrics beneath the south-central United States: Constraints from shear-wave splitting measurements

Geosphere ◽  
2008 ◽  
Vol 4 (2) ◽  
pp. 411 ◽  
Author(s):  
Stephen S. Gao ◽  
Kelly H. Liu ◽  
Robert J. Stern ◽  
G. Randy Keller ◽  
John P. Hogan ◽  
...  
Keyword(s):  
United States ◽  
Shear Wave ◽  
Shear Wave Splitting ◽  
The South ◽  
South Central ◽  
Wave Splitting ◽  
Central United States

scholarly journals Flow plane orientation in the upper mantle under the Western/Central United States from SKS shear-wave splitting observations

2020 ◽  
Vol 221 (2) ◽  
pp. 1125-1137
Author(s):  
Eric Löberich ◽  
Götz Bokelmann
Keyword(s):  
United States ◽  
Shear Wave ◽  
Upper Mantle ◽  
Seismic Anisotropy ◽  
Shear Wave Splitting ◽  
Azimuthal Dependence ◽  
Additional Information ◽  
Wave Splitting ◽  
Central United States ◽  
Flow Plane

SUMMARY The causes of seismic anisotropy are still under debate. In particular, it is important to understand the extent to which seismic anisotropy is due to more recent geodynamic activities in the asthenosphere, or to frozen-in deformation in the lithosphere. We show that these two endmember cases can in principle be distinguished using shear-wave splitting observations from SKS waves. This is illustrated by the simple example of pure olivine with horizontal a-axis, and differing orientations of the other two axes, namely, vertical b and vertical c. The azimuthal dependence of shear-wave splitting measurements is described by two parameters, which can provide additional information about subsurface deformation. In particular, the oscillation parameter d1 constrains the orientation of foliation. We demonstrate that shear-wave splitting in the Western and Central United States indeed shows the predicted azimuthal dependence, related to a mainly subhorizontally oriented flow plane of deformation in the upper mantle. This has important implications for asthenospheric flow.

Lithospheric and asthenospheric contributions to shear-wave splitting observations in the southeastern United States

2012 ◽  
Vol 341-344 ◽  
pp. 128-138 ◽  
Author(s):  
Lara S. Wagner ◽  
Maureen D. Long ◽  
Mignon D. Johnston ◽  
Margaret H. Benoit
Keyword(s):  
United States ◽  
Shear Wave ◽  
Southeastern United States ◽  
Shear Wave Splitting ◽  
Wave Splitting

Mantle flow under the western United States from shear wave splitting

2006 ◽  
Vol 247 (3-4) ◽  
pp. 235-251 ◽  
Author(s):  
T BECKER ◽  
V SCHULTEPELKUM ◽  
D BLACKMAN ◽  
J KELLOGG ◽  
R OCONNELL
Keyword(s):  
United States ◽  
Shear Wave ◽  
Shear Wave Splitting ◽  
Western United States ◽  
Mantle Flow ◽  
Wave Splitting
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