Work

Normal mode splitting due to inner core attenuation anisotropy

Year: 2013

Type: article

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.

Source: Geophysical Journal International

DOI: 10.1093/gji/ggt332

Authors: Anna M. Mäkinen, Arwen Deuss

Institution: University of Cambridge

Language: English

Topic: Seismic Waves and Analysis

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: bronze

Funders: Leverhulme Trust, FP7 Ideas: European Research Council

Awards: Thermal and compositional state of the Earth's inner core from seismic free oscillations, G3456816189