Data Services Products: EMC-SAVANI_US A radially anisotropic whole mantle model with high data and node density in the continuous US.



Title A radially anisotropic whole mantle model with high data and node density in the continuous US
Type 3-D Tomography Earth Model
Sub Type Isotropic shear velocity perturbation, radial anisotropy, horizontally polarized shear velocity, and vertically polarized shear velocity
Year 2021
Data Revision r0.0 (revision history)
Short Description   SAVANI_US is based on SAVANI (Auer et al., 2014 JGR), but with increased data density based on body wave phases from the USArray Array Network Facility and Lai and Garnerno, 2019 G3 and ambient noise surface waves from Ekström, 2017 PEPI. See also SPani for a related model.
Authors: Rob Porritt,
Institute for Geophysics, Jackson School of Geosciences, The University of Texas at Austin

Thorsten Becker
Institute for Geophysics, Jackson School of Geosciences, The University of Texas at Austin
Department of Geosciences, Jackson School of Geosciences, The University of Texas at Austin

Lapo Boschi
Dipartimento di Geoscienze, Università degli Studi di Padova,35131
Padova PD, Italy
Institut des Sciences de la Terre de Paris, Sorbonne Université, CNRS-INSU, ISTeP UMR 7193, Paris, France
Istituto Nazionale di Geofisica e Vulcanologia, Bologna, Via Donato Creti, 12, 40128 Bologna, Italy

Ludwig Auer,
Swiss Seismological Survey, ETH Zurich
Previous Model N/A
Reference Model PREM
Model Homepage
Model Download (see metadata) in netCDF 3 Classic format.
Depth Coverage 0.5 to 2775 km
Area Global
Data Set Description The dataset combines multiple S phase arrival time delays relative to a prediction based on PREM with fundamental mode and first overtone surface waves from 15 seconds to 250 seconds period. Multi-phase S arrivals are from Ritsema et al., 2011 GJI, Lai and Garnerno, 2019 G3, and the Array Network Facility. Surface wave data is from Visser et al., 2008 GJI and Ekström 2011 GJI, 2014 EPSL, and 2017 PEPI. Body wave sensitivity is based on infinite frequency ray theory.

Figure 1
Figure 1: Isotropic shear velocity at various depths as annotated on the colorbar.

Citations and DOIs

To cite the original work behind this Earth model:

  • Porritt, R. W., T. W. Becker, L. Boschi, and L. Auer, (2021) Multi-scale, radially anisotropic shear wave imaging of the mantle underneath the contiguous United States through joint inversion of USArray and global datasets, Geophysical Journal International, ggab185,

To cite IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854,

DOI for this EMC webpage:


  • Auer, L., L. Boschi, T. W. Becker, T. Nissen-Meyer, and D. Giardini (2014), Savani: A variable resolution whole-mantle model of anisotropic shear velocity variations based on multiple data sets, J. Geophys. Res. Solid Earth, 119, 3006–3034,
  • Ekström, G. (2011). A global model of Love and Rayleigh surface wave dispersion and anisotropy, 25-250 s. Geophysical Journal International, 187(3):1668-1686.
  • Ekström, G. (2014), Love and Rayleigh phase-velocity maps, 5-40 s, of the western and central USA from USArray data. Earth and Planetary Science Letters, 402, pp 42-49.
  • Ekström, G. (2017). Short‐period surface‐wave phase velocities across the conterminous United States. Physics of the Earth and Planetary Interiors, 270, 168–175.
  • Lai, H., Garnero, E. J., Grand, S. P., Porritt, R. W., & Becker, T. W. (2019). Global travel time data set from adaptive empirical wavelet construction. Geochemistry, Geophysics, Geosystems, 20, 2175– 2198.
  • Ritsema, J., Deuss, A., van Heijst, J., and J.H., W. (2011). S40RTS: a degree-40 shear-velocity model for the mantle from new Rayleigh wave dispersion, tele-
    seismic traveltime and normal-mode splitting function measurements. Geophysical Journal International, 184(3):1223-1236.
  • Visser, K., Trampert, J., and Kennett, B. L. N. (2008). Global anisotropic phase velocity maps for higher mode Love and Rayleigh waves. Geophysical Journal International, 172(3):1016-1032.


  • r0.0 model provided by Rob Porritt.

Revision History

revision r0.0: uploaded May 24, 2021.



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