Observations of core-mantle boundary Stoneley modes

Koelemeijer, Paula and Deuss, Arwen and Ritsema, Jeroen (2013) Observations of core-mantle boundary Stoneley modes. Geophysical Research Letters, 40 (11). pp. 2557-2561. ISSN eissn:1944-8007 DOI 10.1002/grl.50514

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Abstract

Core-mantle boundary (CMB) Stoneley modes represent a unique class of normal modes with extremely strong sensitivity to wave speed and density variations in the D″ region. We measure splitting functions of 8 CMB Stoneley modes using modal spectra from 93 events with Mw > 7.4 between 1976–2011. The obtained splitting function maps correlate well with the predicted splitting calculated for S20RTS+Crust5.1 structure and the distribution of Sdiff and Pdiff travel time anomalies, suggesting that they are robust. We illustrate how our new CMB Stoneley mode splitting functions can be used to estimate density variations in the Earth's lowermost mantle.

Item Type:	Article
Additional Information:	©2013 American Geophysical Union. All Rights Reserved
Uncontrolled Keywords:	2013AREP; IA65;
Subjects:	02 - Geodynamics, Geophysics and Tectonics
Divisions:	02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title:	Geophysical Research Letters
Volume:	40
Page Range:	pp. 2557-2561
Identification Number:	10.1002/grl.50514
Depositing User:	Sarah Humbert
Date Deposited:	03 May 2013 16:29
Last Modified:	11 Jul 2014 11:42
URI:	http://eprints.esc.cam.ac.uk/id/eprint/2767

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