Abstract
IN two previous papers1,2, I have shown that, taking a fairly direct interpretation of Bolt's revised P seismic velocities3 for the Earth's core, it is possible to arrive at an estimate of order 15 g/cm3 for the Earth's central density (ρ0). In the second of the two papers, I pointed out that the estimate could be lowered if one made the ad hoc assumption that there is rigidity (μ) decreasing with depth in the lower core. I have since carried out some calculations related to this assumption, and the present report is to give an account of some of the more interesting tentative results. Details of the calculations are to be published elsewhere.
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References
Bullen, K. E., Nature, 196, 973 (1962).
Bullen, K. E., Geophys. J. Roy. Astron. Soc., 7, 584 (1963).
Bolt, B. A., Nature, 196, 122 (1962).
Bullen, K. E., Introduction to the Theory of Seismology, third ed., 240 (Camb. Univ. Press, 1963).
Birch, F., Geophys. J. Roy. Astron. Soc., 4, 309 (1961).
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BULLEN, K. Rigidity and Density in the Earth's Core. Nature 201, 807 (1964). https://doi.org/10.1038/201807a0
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DOI: https://doi.org/10.1038/201807a0
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