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Bulletin of the Seismological Society of America; October 1970; v. 60; no. 5; p. 1427-1436
© 1970 Seismological Society of America
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Shear velocities in the lower mantle and the radius of the core

A. L. HALES and J. L. ROBERTS

DIVISION OF GEOSCIENCES THE UNIVERSITY OF TEXAS AT DALLAS P. O. Box 30365,, DALLAS, TEXAS 75230

Abstract

Two S velocity models for the lower mantle are derived from the S travel times recently reported by Hales and Roberts. Observations of the difference in travel time of S and ScS are reported. On the basis of these observations it is estimated that the radius of the Earth's core is (3489.92 ± 4.66) km for one velocity model and (3486.10 ± 4.59) km for another.




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G. G. R. BUCHBINDER
Comments on "Shear-wave travel times from SS" by Rhett Butler
Bulletin of the Seismological Society of America, December 1, 1980; 70(6): 2299 - 2300.
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R. BUTLER
A reply
Bulletin of the Seismological Society of America, December 1, 1980; 70(6): 2301 - 2302.
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 Bulletin of the Seismological Society of AmericaHome page
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Shear-wave travel times from SS
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R. S. HART and R. BUTLER
Shear-wave travel times and amplitudes for two well-constrained earthquakes
Bulletin of the Seismological Society of America, August 1, 1978; 68(4): 973 - 985.
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M. NIAZI
SH travel times and lateral heterogeneities in the lower mantle
Bulletin of the Seismological Society of America, December 1, 1973; 63(6-1): 2035 - 2046.
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A. L. HALES and J. L. ROBERTS
The velocities in the outer core
Bulletin of the Seismological Society of America, August 1, 1971; 61(4): 1051 - 1059.
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A. M. Dziewonski and A. M. Dziewonski
Overtones of Free Oscillations and the Structure of the Earth's Interior
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