O&amp;G - Ruptured ectopic

Masters, Melbourne

doi:10.53347/rid-75811

Cited by 1 publication

(2 citation statements)

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“…We use MINEOS (Masters et al, 2011;Woodhouse, 1988) to forward model the eigenfrequencies (center frequencies) and eigenfunctions of the free oscillations of a given model. Slow and dense layers of different thicknesses are inserted above the CMB into a 1D model.…”

Section: Normal Mode Sensitivity To a Layermentioning

confidence: 99%

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Evidence for a Kilometer‐Scale Seismically Slow Layer Atop the Core‐Mantle Boundary From Normal Modes

Russell,

Irving,

Jagt

et al. 2023

Geophysical Research Letters

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Geodynamic modeling and seismic studies have highlighted the possibility that a thin layer of low seismic velocities, potentially molten, may sit atop the core‐mantle boundary but has thus far eluded detection. In this study we employ normal modes, an independent data type to body waves, to assess the visibility of a seismically slow layer atop the core‐mantle boundary to normal mode center frequencies. Using forward modeling and a data set of 353 normal mode observations we find that some center frequencies are sensitive to one‐dimensional kilometer‐scale structure at the core‐mantle boundary. Furthermore, a global slow and dense layer 1–3 km thick is better‐fitting than no layer. The well‐fitting parameter space is broad with a wide range of possible seismic parameters, which precludes inferring a possible composition or phase. Our methodology cannot uniquely detect a layer in the Earth but one should be considered possible and accounted for in future studies.

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Section: Normal Mode Sensitivity To a Layermentioning

confidence: 99%

“…A table of all modes used, along with their center frequencies and the errors employed can be found in Supporting Information S1 and is also available on Zenodo (Russell et al, 2023). To calculate eigenfrequencies and eigenfunctions we used MINEOS version 1.0.2 (Masters et al, 2011), published under the GPL2 license.…”

Section: Data Availability Statementmentioning

confidence: 99%