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Irregular Transition Layer Beneath the Earth's Inner Core Boundary From Observations of Antipodal PKIKP and PKIIKP Waves

Attanayake, Januka; Thomas, Christine B.; Cormier, Vernon F; Miller, Meghan; Koper, Keith


Standard Earth models assume a simple uniform inner core boundary (ICB) separating the liquid iron outer core from the solid iron inner core. Metallurgical and geodynamic experiments, however, predict lateral variations along this boundary originating from thermochemical and geodynamic instabilities during solidification. We search for evidence of this lateral heterogeneity by exploiting the sensitivity of antipodal PKIIKP waveforms to the shear wave velocity structure of the uppermost inner...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Geochemistry, Geophysics, Geosystems
DOI: 10.1029/2018GC007562
Access Rights: Open Access


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