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 language | English |
|---|---|
| Pages (from-to) | 1786-1795 |
| Number of pages | 10 |
| Journal | Geophysical Journal International |
| Volume | 195 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Dec 2013 |
Funding
The authors thank two anonymous reviewers for their constructive comments that have improved this manuscript. AMM and AD are funded by European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement 204995. AD is also funded by a Philip Leverhulme Prize.
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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