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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 54
  4. 2
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 54
  5. 2

1944年東南海地震津波の波源モデル

https://doi.org/10.15083/0000033109
https://doi.org/10.15083/0000033109
2c6faa9a-04ab-4d53-88f8-942292ebf943
名前 / ファイル ライセンス アクション
ji0542005.pdf ji0542005.pdf (911.5 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2008-05-30
タイトル
タイトル 1944年東南海地震津波の波源モデル
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 10.15083/0000033109
ID登録タイプ JaLC
その他のタイトル
その他のタイトル A Source Model of the Tsunami accompanying the Tonankai Earthquake of 1944
著者 相田, 勇

× 相田, 勇

WEKO 129126

相田, 勇

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著者別名
識別子Scheme WEKO
識別子 129127
姓名 Aida, Isamu
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 For the Tonankai earthquake of 1944, somewhat different fault models have been proposed by Kanamori (Model I), Ando (Model II), Inouchi and Sato (Model III), and Ishibashi (Model IV). These fault models are examined, in the present paper, from the view-point of the tsunami generation and the optimum model with respect to the tsunami is selected. At first the tsunami behavior originated from each fault model are computed with the aid of hydrodynamic numerical experiments. Then, the geographic distribution of ratios of the observed to the computed wave amplitudes for the first and the second half cycles at 6 tidegage stations extending over 700 km along the Pacific coast of Honshu and Shikoku are examined. If these ratios do not depend on the locations, then the fault model may be considered to be consistent with the observed tsunami behavior, provided that the magnitude of the fault slip is to be multiplied by the mean value of the ratios. By these procedures, it is found that Model IIP by Inouchi and Sato with the reducing facter 0.45 seems to be the best among the four models. In this model, two fault planes are assumed to strike in the direction of N45°E from the point of 33.08°N and 136.3°E. The first fault has the area of 154 km long and 67 km wide and the second fault the area of 84 km long and 78 km wide on the northeastern extension of the first fault. The slip displacements of both faults are given as 2.0 m and 1.4 m for the reversal dip-slip component and 0.7 m and 0.5 m for the left lateral component, respectively. The Model III'with the above reduction gives reasonable ratios between the computed wave height along the 200 m depth contour and the measured run-up heights along the coast line of 360 km facing directly the tsunami source area. Furthermore, by the detailed computations within the bays, the satisfactory agreement of the observed and the computed wave patterns is achieved at Owase bay which is located near the center of tsunami source and in Shimoda bay which is about 150 km distant from the margin of the source area. In conclusion, a seismic fault model can be considered a fairly good approximation to the source model for the tsunami generated in the region along the Nankai trough.
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 54, 号 2, p. 329-341, 発行日 1979-12-25
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Scheme NDC
主題 453
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
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