Observations of core‐mantle boundary Stoneley modes

Paula Koelemeijer, Arwen Deuss, Jeroen Ritsema

Research output: Contribution to journalArticlepeer-review


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 eight CMB Stoneley modes using modal spectra from 93 events with Mw> 7.4 between 1976 and 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.

Original languageEnglish
Pages (from-to)2557-2561
Number of pages5
JournalGeophysical Research Letters
Issue number11
Early online date1 May 2013
Publication statusPublished - 16 Jun 2013


  • core-mantle boundary
  • lowermost mantle
  • normal modes
  • splitting functions
  • Stoneley modes

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