Abstract
IN the course of an investigation into magnetic secular variation, a number of spherical harmonic analyses were performed on successive 5 year means of results from eighty magnetic observatories. From the first three spherical harmonic coefficients the moment of the equivalent dipole of the geomagnetic field (M) can be deduced in terms of the radius of the Earth (a) from the relation 
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References
Nagata, T., J. Geomag. Geoelec., Kyoto, 17, 263 (1965).
Finch, H. F., and Leaton, B. R., Mon. Not. Roy. Astro. Soc. Geophys. Suppl., 7, 314 (1957).
Leaton, B. R., Royal Observatory Bulletin No. 57 (1962).
Leaton, B. R., Rep. D4–1 (Intern. Assoc. Geomag. Aeron., Berkeley, 1963).
Hurwitz, L., Knapp, D. G., Nelson, J. H., and Watson, D. E., J. Geophys. Res., 71, 2373 (1966).
Leaton, B. R., Malin, S. R. C., and Evans, M. J., J. Geomag. Geoelec., Kyoto, 17, 187 (1965).
Procopiu, S., Bull, de l'Ecole Polytechnique de Iassy, 2, 457 (1947).
Gabier-Puertas, C., Rev. Geofis. Madrid, 10, 155 (1951).
Bullard, E. C., J. Geophys. Res., 58, 277 (1953).
Macht, H. G., J. Geophys. Res., 59, 369 (1954).
Nagata, T., and Rikitake, T., J. Geomag. Geoelec., Kyoto, 9, 42 (1957).
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LEATON, B., MALIN, S. Recent Changes in the Magnetic Dipole Moment of the Earth. Nature 213, 1110 (1967). https://doi.org/10.1038/2131110a0
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DOI: https://doi.org/10.1038/2131110a0
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