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タイトル: Electromagnetic Induction within Non-uniform Plane and Spherical Sheets.
その他のタイトル: 不均質薄層の電磁感応
著者: Rikitake, Tsuneji
著者(別言語): 力武, 常次
発行日: 1968年2月10日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第45冊第4号, 1968.2.10, pp. 1229-1294
抄録: Computer programmes for studying electromagnetic inductions in plane and spherical sheets having any conductivity distribution are compiled. Application of the programme to a plane sheet which simulates a gradual increase in the sea-depth from the coast-line leads to a conclusion that a high concentration of the induced current takes place over the deep sea area resulting in an anomalous magnetic variation field there. Electromagnetic induction in a spherical sheet, which represents the large-scale non-uniform conductivity distribution of the earth's surface, proves that the induced currents tend to be deflected from the low-conducting continental areas and to encircle the oceanic areas. The most remarkable current vortex takes place over the South Pacific. It seems likely that the Sq, s.s.c. and the like would be seriously affected by the induced fields, although the influence of the surface conductivity would become small to some extent if proper account is taken of the coupling between the surface sheet and the conducting mantle.
URI: http://hdl.handle.net/2261/12370
ISSN: 00408972


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