Preliminary reference Earth model

<h2 id="external-links">External links</h2>
<ul><li><a href="http://ds.iris.edu/ds/products/emc-prem/">IRIS EMC - Reference Earth Models</a></li>
<li><a href="http://ds.iris.edu/files/products/emc/data/GYPSUM/StartingVpModel_PREM.txt">Table of values in PREM model</a></li>
<li><a href="http://www.typnet.net/Essays/EarthGrav.htm">Model formulas, inputs, and overview</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>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. <a href="https://www.cfa.harvard.edu/~lzeng/papers/PREM.pdf" target="_blank">https://www.cfa.harvard.edu/~lzeng/papers/PREM.pdf</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>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) <a href="9780444527486" target="_blank">9780444527486</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>Kennett, B.L.N. (1991). IASPEI 1991 Seismological Tables. Canberra, Australia: Bibliotech. <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>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. <a href="https://doi.org/10.1111%2Fj.1365-246X.1995.tb03540.x" target="_blank">https://doi.org/10.1111%2Fj.1365-246X.1995.tb03540.x</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
</ol>

Preliminary reference Earth model open-in-new

Preliminary reference Earth model