About SPUD

SPUD Version 3.0

The Searchable Product Depository (SPUD) is the IRIS DMC's primary data product management system. Complementing the DMC's SEED and assembled data archives, which contain time series recordings, the SPUD system primarily contains derivative data products of other types (images, movies, etc.) created either at the DMC or by members of the community.

For users SPUD is the query and access point for these products. The web interfaces allow users to search for products using customized queries across product and event details. Users can search across all product types at once or within specific product types. SPUD also has web service interfaces for programmatic discovery and access to the data products.

If any products from SPUD are used in your research please be sure to cite the identified author of the product and the IRIS DMS [Citation Information].

About Earth Model Products

The Earth models presented here are contributed to the IRIS Earth Model Collaboration (EMC) by various researchers.

Two general types of model are available for download:

  • Tomography Models:
    The contributed Earth models in their original format and in a common netCDF (network Common Data Form). A model overview page provides a summary of the model.

  • Reference Models:
    Most EMC Earth models are expressed as perturbations relative to a particular reference 1-D model. These reference models are available for download in expanded comma separated value (CSV) file format with the first two lines representing the file’s header.

For model visualization and additional information about the models visit the IRIS EMC Product Page.

Citing Earth Model Products

If you use Earth Models in publications, please cite according to the instructions at:

Chang, S.-J., A.M.G. Ferreira, J. Ritsema, H.J. van Heijst, and J.H. Woodhouse (2015), Joint inversion for global isotropic and radially anisotropic mantle structure including crustal thickness perturbations, J. Geophys. Res., 120, 4278-4300, doi:10.1002/2014JB011824.

http://ds.iris.edu/ds/products/emc/#citation

When citing this Earth Model page please use the Digital Object Identifier (DOI):

doi:10.17611/DP/13619038

Earth Model Help

The page displays information for individual Earth Models.

The model information is summarized at the top including links to further information.
3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets icon
Model Summary
Name:  SGLOBE-rani
Title:  3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets
Type: 3-D Tomography Earth Model
Sub Type:  Shear-wave velocity (%) and radial anisotropy (% and (SH/SV)^2)
Year 2015
Author(s): Sung-Joon Chang
Division of Geology and Geophysics
Kangwon National University
Chuncheon, Gangwon-do 24341, South Korea

Ana M.G. Ferreira
Department of Earth Sciences
University College London
London, WC1E 6BT, UK
Reference(s): Chang, S.-J., A.M.G. Ferreira, J. Ritsema, H.J. van Heijst, and J.H. Woodhouse (2015), Joint inversion for global isotropic and radially anisotropic mantle structure including crustal thickness perturbations, J. Geophys. Res., 120, 4278-4300, doi:10.1002/2014JB011824.
DOI: doi:10.17611/DP/13619038
Depth Coverage: 25.0 - 2800.0 km
Areal Coverage: Latitude: -88.0 to 88.0 Longitude: -180.0 to 178.0
Model Description SGLOBE-rani is a global radially anisotropic shear wave speed model with radial anisotropy allowed in the whole mantle. It is based on a seismic data set of over 43M seismic surface wave (fundamental and overtones) and body wave measurements. It models simultaneously crustal thickness and mantle structure, and its reference model is PREM. NOTE: Kustowski et al., 2008 and Chang et al., 2014 showed that the anisotropic structure in the lowermost mantle retrieved from global tomographic inversions can be strongly affected by leakage effects, so we discourage interpreting SGLOBE-rani’s anisotropic structure below ~1500 km depth.
Data Set Description [Chang et al. (2015)] The data set includes ~43M surface wave measurements for fundamental-mode and higher-mode up to 6th order phase velocities and fundamental-mode group velocities and ~420K body wave travel times.
EMC Page ds.iris.edu/ds/products/emc-sglobe-rani/
Model Data
DescriptionSizeModel
netCDF binary files for the above model expressed as Voigt isotropy 2.3 MB
netCDF binary files for the above model expressed as radial anisotropy in percentage 2.3 MB
netCDF binary files for the above model expressed as radial anisotropy in (SH/SV)^2 dimensionless scale 2.3 MB
Based On
TypeNameTitleReference
1D ReferencePREMPreliminary Reference Earth Model (PREM) Dziewonski and Anderson (1981)
Figure, Chang et al. (2015), Shear-wave Voigt isotropy and radial anisotropy perturbations (%) with respect to PREM at multiple depths. Depths and the corresponding ranges of model amplitude variations are shown.
Model Areal Coverage
Contributions