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Model representing the average Earth properties as a function of planetary radius
Earth's Gravity according to PREM. Green curves show hypothetical Earths with density constant (dashed) and decreasing linearly from center to surface (stippled)
The preliminary reference Earth model (PREM ) plots the average of
Earth 's properties by depth.
[1] It includes a table of Earth properties, including
elastic properties,
attenuation ,
density ,
pressure , and
gravity .
PREM has been widely used as the basis for
seismic tomography and related global
geophysical models.
[2] It incorporates anelastic dispersion and
anisotropy and therefore it is frequency-dependent and transversely
isotropic for the
upper mantle .
PREM was developed by
Adam M. Dziewonski and
Don L. Anderson in response to guidelines of a "Standard Earth Model Committee" of the
International Association of Geodesy (IAG) and the
International Association of Seismology and Physics of the Earth's Interior (IASPEI) Other Earth reference models include iasp91
[3] and ak135.
[4]
References
^ Dziewonski, Adam M.; Anderson, Don L. (June 1981).
"Preliminary reference Earth model" (PDF) . Physics of the Earth and Planetary Interiors . 25 (4): 297–356.
Bibcode :
1981PEPI...25..297D .
doi :
10.1016/0031-9201(81)90046-7 .
^ Dziewonski, A. M.; Romanowicz, B.A. (2007). Schubert, Gerald (ed.). 1.01 - Overview . pp. 1–29.
doi :
10.1016/B978-044452748-6.00001-8 .
ISBN
9780444527486 .
^ Kennett, B.L.N. (1991). IASPEI 1991 Seismological Tables . Canberra, Australia: Bibliotech.
^ Kennett, B. L. N.; Engdahl, E. R.; Buland, R. (1995-07-01).
"Constraints on seismic velocities in the Earth from traveltimes" . Geophysical Journal International . 122 (1): 108–124.
Bibcode :
1995GeoJI.122..108K .
doi :
10.1111/j.1365-246X.1995.tb03540.x .
ISSN
1365-246X .
External links