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:

Dziewonski, A. M., and D. L. Anderson. 1981. "Preliminary reference Earth model." Phys. Earth Plan. Int. 25:297-356.

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/9991844

Earth Model Help

The page displays information for individual Earth Models.

The model information is summarized at the top including links to further information.
Preliminary Reference Earth Model (PREM) (Inactive) icon
Model Summary
Name:  PREM
Title:  Preliminary Reference Earth Model (PREM)
Type: 1D Reference
Sub Type:  full model
Author(s): A. M. Dziewonski & D. L. Anderson
Reference(s): Dziewonski, A. M., and D. L. Anderson. 1981. "Preliminary reference Earth model." Phys. Earth Plan. Int. 25:297-356.
DOI: doi:10.17611/DP/9991844
Depth Coverage: 0.0 - 6371.0 km
Model Description An average Earth model that incorporates anelastic dispersion and anisotropy and therefore it is frequency-dependent and transversely isotropic for the upper mantle.
EMC Page ds.iris.edu/ds/products/emc-prem
Model Data
DescriptionSizeModel
model computed from the polynomial coefficients at period of 1s, Dziewonski and Anderson (1981): in comma separated value (CSV) file format [columns from left to right represent radius,depth,density,Vpv,Vph,Vsv,Vsh,eta,Q-mu,Q-kappa] 14.0 KB
model computed from the polynomial coefficients at period of 1s, Dziewonski and Anderson (1981): in IDV CSV format 14.2 KB
The anisotropic PREM model used by SAW24B16 in its original format 7.8 KB
The anisotropic PREM model used by SAW24B16 in comma separated value (CSV) file format [columns from left to right: (radius,density,Vpv,Vsv,Q-kappa,Q-mu,Vph,Vsh,eta)] 6.2 KB
The anisotropic PREM model used by SAW24B16 in comma separated value (CSV) IDV file format 6.4 KB
PREM500 model in its original format 39.9 KB
PREM500 in comma separated value (CSV) file format [columns left to right: radius(m),density(kg/m^3),Vpv(m/s),Vsv(m/s),Q-kappa,Q-mu,Vph(m/s),Vsh(m/s),eta] 34.8 KB
PREM500 in comma separated value (CSV) IDV file format 35.0 KB
PREM model used by GyPSum as the reference P-wave model (1-s, isotropic equivalent PREM given in Table II of Dziewonski and Anderson, 1981) in its original format 1.3 KB
PREM as used by GyPSum in comma separated value (CSV) file format [columns left to right: radius(km),Vp(km/s)] 1.0 KB
PREM as used by GyPSum in comma separated value (CSV) IDV file format 1.1 KB
Referenced By
TypeNameTitleReference
1D ReferencePREM500Modified PREM (Preliminary Reference Earth Model) Panning and Romanowicz (2006)
3-D Tomography Earth ModelSEISGLOB1 Model based on the joint inversion of normal modes and surface waves. Durand, Debayle, Ricard, and Lambotte (2016)
3-D Tomography Earth Model SGLOBE-rani 3D global shear-wave isotropic and radially anisotropic model from a joint inversion for multiple data sets Chang et al. (2015)
3-D Tomography Earth ModelSPaniA global joint model of radially anisotropic P- and S-wave velocity heterogeneity Tesoniero, Auer, Boschi, and Cammarano (2015)
3D TomographySAW24B16A global shear velocity structure of the mantle Megnin and Romanowicz (2000)
3-D Tomography Earth ModelSEISGLOB2 Model based on the joint inversion of normal modes and surface waves. Durand, Debayle, Ricard, Zaroli, and Lambotte (2017)
Anisotropic Preliminary Reference Earth Model (PREM) used by SAW24B16
Contributions