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.

Citation

  • Dziewonski, A.M., and D.L. Anderson. 1981. “Preliminary reference Earth model.” Phys. Earth Plan. Int. 25:297-356.
  • 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 application, Seismological Research Letters, 83(6), 846:854. doi: 10.1785/0220 120032

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

DOI

There is no DOI currently assigned for this product.

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