Summary
(referenced by SGLOBE-rani, 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.
Quicklinks
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 | SGLOBE-rani, 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 |
| Area | Point data |
Citations and DOIs
To cite the original work behind this Earth model:
- Dziewonski, A.M., and D.L. Anderson. 1981. “Preliminary reference Earth model.” Phys. Earth Plan. Int. 25:297-356. https://doi.org/10.1016/0031-9201(81)90046-7.
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, https://doi.org/10.1785/0220120032.
DOI for this EMC webpage:
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
