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水成岩層の地震波傅播に及ぼす影響
https://doi.org/10.15083/0000034990
https://doi.org/10.15083/0000034990684e9f34-f480-4ebe-bbac-ed314b834c36
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-06-06 | |||||
タイトル | ||||||
タイトル | 水成岩層の地震波傅播に及ぼす影響 | |||||
言語 | ja | |||||
言語 | ||||||
言語 | jpn | |||||
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 | 10.15083/0000034990 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | The Effect of Superficial Sedimentary Layers upon the Transmission of Seismic Waves | |||||
著者 |
今村, 明恒
× 今村, 明恒× 岸上, 冬彦× 小平, 孝雄 |
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著者別名 | ||||||
識別子 | 135027 | |||||
識別子Scheme | WEKO | |||||
姓名 | Imamura, Akitune | |||||
著者別名 | ||||||
識別子 | 135028 | |||||
識別子Scheme | WEKO | |||||
姓名 | Kishinouye, Fuyuhiko | |||||
著者別名 | ||||||
識別子 | 135029 | |||||
識別子Scheme | WEKO | |||||
姓名 | Kodaira, Takao | |||||
著者所属 | ||||||
著者所属 | 地震研究所 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Since k in Omori's empirical formula d=kt may be made to assume the physical meaning k=v1.v2/(v1-v2), where d is the distance of the seismic focus from a station, t the duration of the preliminary tremors at the said station, and v1 and v2 the respective transit velocities of the dilatational and distortional waves, it will be seen that the factor is by no means a constant, but must vary with v1 and v2, and must therefore be some function of the focal depth f, say, and the epicentral distance △. For near distances, Omori deduced for it the value 7.42, but evidence is not wanting that in the younger geo-logical formations it may take as low a value as 2, or even 1.5. For the local shocks so frequent in the Kii district, one of us obtained the value 3.0. Consequently, in determining the seismic focus by t obtained at four or more stations with the assumption of wave transmission along a single straight line with k as constant, inaccuracies in the results will be inevitable. Similarly, the usual method of estimating focal depths by the time-distance curve of P-, P or S--P- must also be subject to several errors when the presence of a superficial sedimentary layer has been ignored. | |||||
書誌情報 |
東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University 巻 7, 号 3, p. 471-487, 発行日 1930-04-08 |
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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 | AN00029699 | |||||
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 | 東京帝国大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, Tokyo Imperial University |