Illustration of constraints on subduction zone seismic anisotropy from a global compilation of shear-wave splitting measurements.

Illustration of constraints on subduction zone seismic anisotropy from shear-wave splitting measurements from the compilation presented in Long (2013). The subduction trenches compiled by Bird (2003) are shown in black. The anisotropic signals of the wedge (orange) and back-slab regions (blue) are shown separately. Blue arrows indicate average fast directions for the back-slab splitting signal from SKS (seismic waves traveling through the Outer Core), local S, and source-side tele-seismic S-splitting measurements (Long and Silver, 2009; Paczkowski, 2012). Orange arrows indicate average fast directions for wedge anisotropy from local S splitting (Long and Wirth, 2013). In regions where multiple fast directions are shown, splitting patterns exhibit a mix of trench-parallel, trench-perpendicular, and oblique fast directions.

  • Creator: Fabio Crameri
  • This version: 01.09.2021
  • License: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
  • Specific citation: This graphic by Fabio Crameri after Crameri and Tackley (2014) and Long (2013) is available via the open-access s-Ink repository.
  • Related references:
    Crameri, F., and P.J. Tackley (2014), Spontaneous development of arcuate single-sided subduction in global 3-D mantle convection models with a free surface, J. Geophys. Res. Solid Earth, 119(7), 5921-5942, doi:10.1002/2014JB010939
    Long, M. D. (2013), Constraints on subduction geodynamics from seismic anisotropy, Rev. Geophys., 51, 76–112, doi:10.1002/rog.20008
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