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Nagata & Arai 1963

Nagata, T. and Arai, Y. (1963). Secular variation of the geomagnetic total force during the last 5,000 years. Journal of Geophysical Research 68(18): 5,277-5,281.

Intensities of the geomagnetic total force (F) at various epochs during the last 5000 yr are deduced from the intensity of natural remanent magnetization of basaltic lavas and baked potteries of known ages. Results show that F increased between about 5000 yr ago and 2000 yr ago when F reached its maximum value, being about 1.5 times as large as at present; F then decreased gradually until the present time. The results are probably accompanied by regional secular variation of appreciable magnitude.

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Keywords
Earth, last 5, 000 years, magnetic field, secular variations, Total, force, 18, Solid-earth geophysics

Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/

Publisher
American Geophysical Union
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