Geomagnetic Intensity: Changes during the Past 3000 Years in the Western Hemisphere

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Science  03 Apr 1970:
Vol. 168, Issue 3927, pp. 111-114
DOI: 10.1126/science.168.3927.111


A series of archeomagnetic measurements have been carried out on archeologic materials from Arizona and Mexico which can be compared with results from Europe and Asia. This comparison shows a westward drift of geomagnetic intensity at a rate of about 0.24 degree per year. Furthermore, an apparent coincidence between changes in the earth's magnetic moment and changes in the production rate of radiocarbon is observed.