Normal mode splitting due to inner core attenuation anisotropy

Anna M. Maekinen*, Arwen Deuss

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The Earth's inner core displays transverse velocity anisotropy with cylindrical symmetry, which causes the anomalous zonal splitting of inner core sensitive normal modes. In this paper, we extend existing theory for calculating normal mode splitting from models of cylindrical velocity anisotropy to include models of anelastic attenuation anisotropy. Furthermore, we derive the equations that can be used to rewrite the attenuation anisotropy parameters natural to normal mode considerations in terms of body wave attenuation anisotropy for compressional and shear waves.

Original languageEnglish
Pages (from-to)1786-1795
Number of pages10
JournalGeophysical Journal International
Volume195
Issue number3
DOIs
Publication statusPublished - Dec 2013

Keywords

  • Core
  • outer core and inner core
  • Elasticity and anelasticity
  • Surface waves and free oscillations
  • Seismic anisotropy
  • Seismic attenuation
  • Theoretical seismology
  • PERIOD NORMAL-MODES
  • FREE OSCILLATIONS
  • EARTH MODEL
  • TRAVEL-TIMES
  • CONSTRAINTS
  • INVERSION
  • ROTATION
  • SPECTRA
  • PKIKP

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