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It turns out, however, that the self-induction is not so large that marked frequency dependence of the vertical field component as observed, for example, on Hachijo-shima Island can be attributed to this origin. 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13. A Theory of Frequency-Dependent Effect of an Island on Geomagnetic Variations
https://doi.org/10.15083/0000033327
https://doi.org/10.15083/00000333279d11296d-8856-41c4-b241-5c55f6ab04ba
名前 / ファイル | ライセンス | アクション |
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ji0482007.pdf (773.1 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | 13. A Theory of Frequency-Dependent Effect of an Island on Geomagnetic Variations | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000033327 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 13.自己感応を考慮した場合の地磁気離島効果理論 | |||||
著者 |
Rikitake, Tsuneji
× Rikitake, Tsuneji |
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著者別名 | ||||||
識別子 | 130126 | |||||
識別子Scheme | WEKO | |||||
姓名 | 力武, 常次 | |||||
著者所属 | ||||||
著者所属 | Earthquake Research Institute | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Self-induction effect of electric current flow around a circular hole in a thin conducting sheet is studied in an approximate way. It turns out, however, that the self-induction is not so large that marked frequency dependence of the vertical field component as observed, for example, on Hachijo-shima Island can be attributed to this origin. A phase lag amounting to several degrees seems likely to have arisen by the self-induction effect provided a periodic variation having a period of 30min. and an island of which the diameter is 10km are assumed.|離島上で観測される地磁気短周期変化が,いわゆる離島効果を示すことは,最近の観測によつて確立された.磁場が北向きに変化する場合には,鉛直成分対水平成分比(⊿Z/⊿H)は通常島の北端で負,南端で正となる.しかし,たとえば八丈島の観測点でみられるように,⊿Z/⊿Hが変化の周期によつて変化し,その符号が変化する場合もある.従来の理論では自己感応の影響が省略されていたが,この論文では,近似的に自己感応の影響を議論し,⊿Z/⊿Hの周期依存性が説明できるか否かをみた.その結果自己感応の影響は比較的小さく,そのような依存性は説明不可能で,たとえば周期によつて海中に流れる電流の場所が異なるというような原因を考えざるを得ないという結果が得られた. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 48, 号 2, p. 189-203, 発行日 1970-06-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |