Summary
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.
Quicklinks
Description
| Name | SAVANI_US |
| Title | A radially anisotropic whole mantle global model with high data and node density in the contiguous 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 | https://github.com/rwporritt/savani |
| Model Download | savani-us.r0.0.nc (see metadata) in netCDF 3 Classic format. |
| Depth Coverage | 0.5 to 2775 km |
| Area | Global with high data and node density in the contiguous US |
| 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. |
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, https://doi.org/10.1093/gji/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, https://doi.org/10.1785/0220120032.
DOI for this EMC webpage:
References
- 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, https://doi.org/10.1002/2013JB010773.
- 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. https://doi.org/10.1016/j.epsl.2013.11.022
- Ekström, G. (2017). Short‐period surface‐wave phase velocities across the conterminous United States. Physics of the Earth and Planetary Interiors, 270, 168–175. https://doi.org/10.1016/j.pepi.2017.07.010
- 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. https://doi.org/
https://doi.org/10.1029/2018GC007905 - 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.
Credits
- r0.0 model provided by Rob Porritt.
Revision History
revision r0.0: uploaded May 24, 2021.
Timeline
- 2022-01-21
- online
