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Shear properties of Earth's inner core constrained by a detection of J waves in global correlation wavefield

Tkalcic, Hrvoje; Pham, Thanh Son

Description

Seismic J waves, shear waves that traverse Earth’s inner core, provide direct constraints on the inner core’s solidity and shear properties. However, these waves have been elusive in the direct seismic wavefield because of their small amplitudes. We devised a new method to detect J waves in the earthquake coda correlation wavefield. They manifest through the similarity with other compressional core-sensitive signals. The inner core is solid, but relatively soft, with shear-wave speeds and shear...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/160372
Source: Science
DOI: 10.1126/science.aau7649

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