Mathematics – Logic
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.256..270p&link_type=abstract
Nature, vol. 256, July 24, 1975, p. 270-273. Research supported by the U.S. Geological Survey.
Mathematics
Logic
7
Earth Rotation, Earthquakes, Geomagnetism, Nutation, Pattern Recognition, Algorithms, Angular Velocity, Climate Change, Long Term Effects, Magnetic Dipoles, Wind Effects
Scientific paper
An answer matrix, consisting of the binary answers to a series of heuristic questions posed for each year from 1901 to 1964, is examined to see if certain patterns emerge in the seismicity of major earthquake belts, the amplitudes of Chandler Wobble, changes in the rotational velocity of the earth, and in the drift of the eccentric geomagnetic dipole. A pattern recognition run was made to test the relationship between earthquake activity and Chandler Wobbler excitation. The results imply a preferential excitation of the wobble by earthquakes in certain places defined by latitude, longitude, fault, and slip orientation. Characteristic traits established for the decaying Chandler Wobble years (G2 years) suggest that the climatic changes induced by volcanic dust lead to zonal wind changes which perturb the rotational velocity. Hypotheses based on the pattern recognition algorithm suggest that all of these diverse phenomena are related.
Briggs Peter
Press Frank
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