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:

Simmons, N.A., A.M. Forte, L. Boschi, and S.P. Grand. 2010. "GyPSuM: A joint tomographic model of mantle density and seismic wave speeds." J. Geophys. Res. 115:B12310.

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/10131119

Earth Model Help

The page displays information for individual Earth Models.

The model information is summarized at the top including links to further information.
A global 3-D model of mantle shear wave (S) and compressional (P) speeds icon
Model Summary
Name:  GyPSuM
Title:  A global 3-D model of mantle shear wave (S) and compressional (P) speeds
Type: 3D Tomography
Sub Type:  P & S velocities
Year 2010
Author(s): Nathan A. Simmons
Atmospheric, Earth and Energy Division
Lawrence Livermore National Laboratory
Livermore, California, USA

Alessandro M. Forte
GEOTOP, Departement des Sciences de la Terre et de l'Atmosphere
Universite du Quebec
Montreal, Montreal, Quebec, Canada

Lapo Boschi
Eidgenossische Technische Hochschule Honggerberg
Institute of Geophysics, Zurich, Switzerland

Stephen P. Grand
Jackson School of Geosciences
University of Texas at Austin
Austin, Texas, USA
Reference(s): Simmons, N.A., A.M. Forte, L. Boschi, and S.P. Grand. 2010. "GyPSuM: A joint tomographic model of mantle density and seismic wave speeds." J. Geophys. Res. 115:B12310.
DOI: doi:10.17611/DP/10131119
Depth Coverage: 0.0 - 2900.0 km
Areal Coverage: Latitude: -90.0 to 90.0 Longitude: -180.0 to 180.0
Model Description GyPSuM is a tomographic model of mantle seismic wave speeds developed through simultaneous inversion of seismic body wave travel times and geodynamic observations.
Data Set Description
EMC Page ds.iris.edu/ds/products/emc-gypsum
Model Data
DescriptionSizeModel
One-degree gridded version of the model zip file includes all necessary model files 8.6 MB
netCDF binary expressed as percent P- & S- velocity perturbations 49.9 MB
netCDF binary of P velocity expressed as km/s 28.9 MB
netCDF binary of S velocity expressed as km/s 27.9 MB
Based On
TypeNameTitleReference
1D ReferenceTNA/SNAAverage of the TNA and SNA models Grand and Helmberger (1984)
[Simmons, Forte, Boschi & Grand (2010)] Shows Thermal, Non-Thermal and Total VP perturbations in the GyPSuM model at 4 depths using different color scales
Model Areal Coverage
Contributions