Core Undertones in an Elliptical Uniformly Rotating Earth

  1. D. E. Smylie and
  2. Raymond Hide
  1. VéRonique Dehant

Published Online: 29 MAR 2013

DOI: 10.1029/GM046p0029

Structure and Dynamics of Earth's Deep Interior

Structure and Dynamics of Earth's Deep Interior

How to Cite

Dehant, V. (1988) Core Undertones in an Elliptical Uniformly Rotating Earth, in Structure and Dynamics of Earth's Deep Interior (eds D. E. Smylie and R. Hide), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM046p0029

Author Information

  1. Institut D'Astronomie Et De GéOphysique G. LemaîTre, Université Catholique De Louvain, 2, Chemin Du Cyclotron, B 1348 Louvain-La-Neuve, Belgique

Publication History

  1. Published Online: 29 MAR 2013
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780875904504

Online ISBN: 9781118666562

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Keywords:

  • Earth—Core—Congresses;
  • Geodynamics—Congresses

Summary

The response of the Earth to an external force is perturbed by resonance effects. The core normal modes are usually ignored because they are considered to be confined in the liquid core. Recent gravity data analysis [Melchior and Ducarme, 1986] has revealed some unexplained periods around 14h that might be related to core normal modes. Various works prepared by “core equation specialists' has been reviewed in order to introduce the core mode effects in the last adopted Earth model i.e. an uniformly rotating, elliptical Earth with an elastic inner core, a liquid core and an elastic mantle. An attempt is made to account for core modes in an elliptical, rotating, compressible and inviscid fluid outer core.