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Theoretical deformations of the Earth’S crust induced by the polar motion — A case study of New Zealand

Theoretical deformations of the Earth’S crust induced by the polar motion — A case study of New... We investigate the long-term Earth’s crustal deformations in New Zealand induced by the polar motion over the period from 1962 to 2009 using a tidal theory of an elastic and oceanless Earth. The theoretical values of crustal deformations are compared for the Gutenberg-Bullen, Ocean-Mantle, Shield-Mantle, 1066A, and PREM models of the Earth. The horizontal and vertical deformations computed using these models differ less than 0.1 mm and 0.15 mm, respectively. The maximum horizontal motion in New Zealand is less than 4 mm over the period from 1962 to 2009. The maximum vertical motion is larger by a factor of about 3 (up to 12.2 mm). The variations in horizontal and vertical motions at different locations within New Zealand are bellow 1 and 3 mm, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Geodaetica et Geophysica Springer Journals

Theoretical deformations of the Earth’S crust induced by the polar motion — A case study of New Zealand

Marinovich, Y.; Tenzer, R.
Acta Geodaetica et Geophysica , Volume 46 (1) – Mar 1, 2011
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11 pages

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Publisher
Springer Journals
Copyright
Copyright © Akadémiai Kiadó 2011
ISSN
2213-5812
eISSN
1587-1037
DOI
10.1556/ageod.46.2011.1.4
Publisher site
See Article on Publisher Site

Abstract

We investigate the long-term Earth’s crustal deformations in New Zealand induced by the polar motion over the period from 1962 to 2009 using a tidal theory of an elastic and oceanless Earth. The theoretical values of crustal deformations are compared for the Gutenberg-Bullen, Ocean-Mantle, Shield-Mantle, 1066A, and PREM models of the Earth. The horizontal and vertical deformations computed using these models differ less than 0.1 mm and 0.15 mm, respectively. The maximum horizontal motion in New Zealand is less than 4 mm over the period from 1962 to 2009. The maximum vertical motion is larger by a factor of about 3 (up to 12.2 mm). The variations in horizontal and vertical motions at different locations within New Zealand are bellow 1 and 3 mm, respectively.

Journal

Acta Geodaetica et Geophysica – Springer Journals

Published: Mar 1, 2011

Keywords: crustal deformation; Earth model; Love numbers; polar motion

References

  • Cahiers de Centre Europeen de Geodynamique et Seismologie
    Beavan, J; Matheson, D; Denys, P; Denham, M; Herring, T; Hager, B; Molnar, P
  • Earth rotation variations-Long period
    Gross, R