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Data Services Products: EMC-PREM Preliminary Reference Earth Model

Summary

(referenced by GyPSum , SAW24B16 and as PREM500 by SAW642AN and SAW642ANb ) The Preliminary Reference Earth Model, Dziewonski and Anderson (1981) , is an average Earth model that incorporates anelastic dispersion and anisotropy and therefore it is frequency-dependent and transversely isotropic for the upper mantle.

Description

Name PREM
Title Preliminary Reference Earth Model (PREM)
Type 1-D Reference Earth Model
Sub Type full model
Year 1981
Short Description   The Preliminary Reference Earth Model, Dziewonski and Anderson (1981) , is an average Earth model that incorporates anelastic dispersion and anisotropy and therefore it is frequency-dependent and transversely isotropic for the upper mantle.
Authors:  
A. M. Dziewonski
Department of Earth and Planetary Sciences
Harvard University
Cambridge, Massachusetts, USA
D. L. Anderson
Seismological Laboratory
California Institute of Technology
Pasadena, California, USA
 
Base Model
Referenced by GyPSum , SAW24B16 and as PREM500 by SAW642AN and SAW642ANb
Model Download  
The PREM model computed from the polynomial coefficients describing the model at period of 1s, Dziewonski and Anderson (1981) : in comma separated value (CSV) file format (PREM_1s.csv ) or in IDV CSV format (PREM_1s_IDV.csv ). Columns from left to right represent radius,depth,density,Vpv,Vph,Vsv,Vsh,eta,Q-mu,Q-kappa
 
The 1s, isotropic equivalent PREM [Table II of Dziewonski and Anderson (1981) ], as used by GyPSum for the P-wave model: in its original format (StartingVpModel_PREM.txt ), comma separated value (CSV) file format (StartingVpModel_PREM.csv ) or in IDV CSV format (StartingVpModel_PREM_IDV.csv )
 
The anisotropic PREM model used by SAW24B16 in its original format (PREM_ANISOTROPIC ), comma separated value (CSV) file format (PREM_ANISOTROPIC.csv ) or in I IDV CSV format (PREM_ANISOTROPIC_IDV.csv )
 
PREM500, a model equivalent to the elastic structure of PREM but with the Q structure of QL6, Durek and Ekstrom (1996) as referenced by SAW642AN and SAW642ANb in its original format (PREM500), comma separated value (CSV) file format (PREM500.csv ) or in IDV CSV format (PREM500_IDV.csv ). Columns from left to right represent radius,density,Vpv,Vsv,Q-kappa,Q-mu,Vph,Vsh,eta
 
Model Homepage
Depth Coverage 0 to 6371.0 km
Areal Coverage Point data
 

 anisotropic Preliminary Reference Earth Model

Image shows the anisotropic Preliminary Reference Earth Model (PREM) used for SAW24B16.

Citations and DOIs

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, doi:10.1785/0220120032.

To cite the source of this Earth model:

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

To reference the use of this Earth model hosted by EMC:

To cite IRIS Earth Model Collaboration (EMC) data product or reference use of its repository:

Reference

  • Durek, J.J. and Ekstrom, G. 1996. “A radial model of anelasticity consistent with long period surface wave attenuation.” Bull. Seism. Soc. Am. 86:144-158.

Credits

  • A.M. Dziewonski and D.L. Anderson

Timeline

2010-12-09
Online

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