Solidity of the Inner Core of the Earth inferred from Normal Mode Observations

Details Solidity of the Inner Core of the Earth inferred from Normal Mode Observations Solidity of the Inner Core of the Earth inferred from Normal Mode Observations

Dec 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971natur.234..465d&link_type=abstract

Nature, Volume 234, Issue 5330, pp. 465-466 (1971).

Computer Science

23

Scientific paper

SOLIDITY of the inner core was originally inferred on the basis of the assumption that the inner core has the same composition as the surrounding material of the outer core1. If, however, the observed increase in compressional velocity is related to a compositional change or, as suggested by Elsasser and Isenberg2, to a new phase of iron with rearranged electronic orbits, then the inner core might be liquid3. It was believed that conclusive evidence of solidity of the inner core would come from observations of body waves of the type PKJKP, SKJKS or SKJKP, phases that travel through the inner core as a shear wave. But no reliable observations of these phases have been reported so far.

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