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:

Kennett B.L.N. and Engdahl E.R., 1991. "Travel times for global earthquake location and phase association." Geophysical Journal International, 105:429-465.

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/9991809

Earth Model Help

The page displays information for individual Earth Models.

The model information is summarized at the top including links to further information.
iasp91 velocity model (Inactive) icon
Model Summary
Name:  IASP91
Title:  iasp91 velocity model
Type: 1D Reference
Sub Type:  P and S velocities
Author(s): B.L.N. Kennett & E.R. Engdahl
Reference(s): Kennett B.L.N. and Engdahl E.R., 1991. "Travel times for global earthquake location and phase association." Geophysical Journal International, 105:429-465.
DOI: doi:10.17611/DP/9991809
Depth Coverage: 0.0 - 6371.0 km
Model Description A parameterised velocity model that has been constructed to be a summary of the travel time characteristics of the main seismic phases.
Web Page www.iaspei.org/projects/projects.html
EMC Page ds.iris.edu/ds/products/emc-iasp91/
Model Data
DescriptionSizeModel
The model in comma separated value (CSV) file format [columns lef to right representing Depth (km), Radius (km), Vp (km/s), and Vs (km/s)] 4.3 KB
The model in comma separated value (CSV) IDV file format 4.4 KB
Referenced By
TypeNameTitleReference
3-D Tomography Earth Model SAM4_P_2017 Regional finite-frequency teleseismic P-wave tomography model for central Chile and Argentina Portner, Beck, Zandt, & Scire (2017)
A 1-D modified IASP91 model MEAN ak135-f velocity model, ak135 full model (spherical average) Marone et al. (2004)
3-D Tomography Earth Model ANA2_P_2018 Regional finite-frequency teleseismic P-wave tomography model for the Eastern Mediterranean Portner, Delph, Biryol, Beck, Zandt, Özacar, Sandvol, and Türkelli (2018)
iasp91 velocity model
Contributions