Preliminary reference Earth model

In this article, we will explore the fascinating world of Preliminary reference Earth model and everything it has to offer. Preliminary reference Earth model has been the subject of interest and debate for centuries, and its impact has been felt in a variety of areas, from science to popular culture. Throughout these pages, we will examine the history of Preliminary reference Earth model, its importance in the modern world and the different perspectives that exist on this topic. Whether you are an expert on Preliminary reference Earth model or simply looking to learn more about it, this article will give you a comprehensive and insightful overview.

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

  1. ^ 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.
  2. ^ Dziewonski, A. M.; Romanowicz, B.A. (2007). Schubert, Gerald (ed.). 1.01 - Overview. pp. 1–29. Bibcode:2007sse..book....1D. doi:10.1016/B978-044452748-6.00001-8. ISBN 9780444527486. {{cite book}}: |journal= ignored (help)
  3. ^ Kennett, B.L.N. (1991). IASPEI 1991 Seismological Tables. Canberra, Australia: Bibliotech.
  4. ^ 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.