σ<SUB>hmin</SUB> -地震発生に関する役割-

• 飯尾 能久

  防災科学技術研究所

書誌事項

タイトル別名

• σ<SUB>hmin</SUB> -A Role on the Generation of Earthquake-
• σhmin--地震発生に関する役割
• シグマhmin ジシン ハッセイ ニ カンスル ヤクワリ
• &sigma;<SUB>hmin</SUB> -A Role on the Generation of Earthquake-
• 特集: 大地震の長期予測はどこまで可能か? V. 総合評価と地殻活動予測モデル

抄録

The role of the minimum horizontal compressional stress (σ_hmin) in the deformation of the Japanese Islands and the occurence of intraplate earthquakes were discussed. The first is the effect of decreasing σ_hmin, which enlarges the Coulomb failure stress. The second is the effect of an absolute value of σ_hmin. Large σ_hmin can promote a plastic flow in the upper crust resulting from a subcritical crack growth of microfractures when the maxmum horizontal compressional stress (σ_hmin) is small, because large σ_hmin and small shear stress (τ) makes cracks to be shutten and then more cracks are filled with pore water when there is less water in the upper crust. It is thought that the northeast Japanese Island (outer arc of the Tohoku district) is situated under such a stress condition. A larger part of the deformation there is probably shared by a plastic flow.

収録刊行物

• 地震　第２輯

  地震　第２輯 50 (appendix), 273-281, 1998

  公益社団法人 日本地震学会

キーワード

• σ<SUB>hmin</SUB>
• Plastic flow
• Subcritical crack growth
• Pore water
• Intraplate earthquake

詳細情報

• CRID: 1390282679283654400
• NII論文ID: 130006788477
• NII論文ID: 40001526985
• NII書誌ID: AN00305741
• DOI: 10.4294/zisin1948.50.appendix_273
• ISSN: 18839029
• ISSN: 2186599X
• ISSN: 00371114
• NDL書誌ID: 4506682
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4506682
• Web Site: https://www.jstage.jst.go.jp/article/zisin1948/50/appendix/50_appendix_273/_pdf
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