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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1973 May;70(5):1410–1413. doi: 10.1073/pnas.70.5.1410

An Informative Solution to a Seismological Inverse Problem

Freeman Gilbert *, Adam Dziewonski , James Brune *
PMCID: PMC433508  PMID: 16592083

Abstract

Preliminary results are presented that infer that 2 sec should be added to the tabular values for P phases and 4 sec to the tabular values for S phases of seismic travel times. From seismic evidence, the radius of the inner core of the Earth is 1229-1250 km; the radius of the outer core is 3482-3485 km. Data are presented relating resolving power with error of measurement for the Earth's mantle.

Keywords: Earth's interior, structure, mass, moment of inertia

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