Rotation of the Earth and Magnetostriction

Details Rotation of the Earth and Magnetostriction Rotation of the Earth and Magnetostriction

Jan 1929

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1929natur.123...15k&link_type=abstract

Nature, Volume 123, Issue 3088, pp. 15-16 (1929).

Astronomy and Astrophysics

Astronomy

Scientific paper

IN 1926, Prof. E. W. Brown presented the evidence indicating remarkable changes in the rate of the earth's rotation (Trans. of the Astronomical Observatory of Yale University, vol. 3, part 6). Changes, more or less abrupt, were shown to have occurred about 1785, 1850, 1898, and 1918. Prof. Brown finds that the observational data are consistent with the hypothesis of an oscillatory change in the earth's mean radius. Why the earth should expand and contract, he makes no suggestion, but gives a study of the occurrence of earthquakes, which, however, shows no well-defined correlation. He cites a theory of Prof. Joly (Observatory, February, 1926) that the vertical oscillations of the earth's crust may be caused by a thermal effect of radium acting in a substratum of basalt.

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