We present a new version of a shear-wave splitting (SWS) database for the western and central United States (WCUS) using broadband seismic data recorded up to the end of 2014 to update a previous version that used data recorded prior to the end of 2012, when the USArray Transportable Array stations were still recording in the easternmost region of theWCUS. A total of 7452 pairs of additional measurements recorded by 1202 digital broadband seismic stations are obtained, and all the measurements in the previous database are rechecked. The resulting uniform SWS database contains a total of 23,448 pairs of well-defined SKS, SKKS, and PKS splitting parameters. Relative to the previous version of the database, the additional measurements notably improved the spatial and azimuthal coverages of the measurements, providing an improved dataset for constraining geodynamic models related to lithospheric deformation and asthenospheric flow, as well as for complex anisotropy recognition and characterization.


Geosciences and Geological and Petroleum Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Database Systems; Geodynamics; Seismology; Shear Flow; Slow Wave Structures; Tectonics; Asthenospheric Flow; Broad-Band Seismic Stations; Geodynamic Models; Lithospheric Deformation; Seismic Datas; Shear Wave Splitting; Teleseismic Shear Waves; Shear Waves; Asthenosphere; Broadband Data; Database; Deformation Mechanism; Geodynamics; Lithospheric Structure; Seismic Anisotropy; Seismic Data; Teleseismic Wave; Wave Splitting; United States

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2016 Seismological Society of America, All rights reserved.

Publication Date

01 Mar 2016