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タイトル: 18. 櫻島に於ける地電流の觀測
その他のタイトル: 18. Measurement of Earth Eurrent in Sakurajima after the Eruption
著者: 力武, 常次
村岡, 一男
著者(別言語): Rikitake, Tsuneji
Muraoka, Kazuo
発行日: 1948年6月30日
出版者: 東京大学地震研究所
掲載誌情報: 東京大學地震研究所彙報. 第24冊第1/4号, 1948.6.30, pp.217-220
抄録: Variations in the north and east component of earth current were measured at Furusato, near the south coast of Sakurajima from March 27 to April 11, 1946. The measuring system was the same with that used at the time of the Tottori Earthquake of 1943. During the observation, the earth potential changed gradually in both components. The changes amounted to about a hundred mV/km. Diurnal variation and short-period variations were observed, and these will be due to the electromagnetic induction caused by the variation in the earth's magnetic field. From 16h to 18h, April 5, the earth current varied anomalously, e pecially in the north component, while there were no remarkable changes in volcanic, activity before and after this variation. In conclusion, we could not find any relation hetween the variation of earth current and that of volcanic activity. In order to make this point clear, it is desirable to observe earth current simultaneously at several stations located all over the volcano.
URI: http://hdl.handle.net/2261/10644
ISSN: 00408972


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