書誌事項
- タイトル別名
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- Damage Caused by the 1995 Hyogoken-Nanbu Earthquake and Concealed Faults in the Hanshin Area, Hyogo Pref., Japan.
- 1995ネン ヒョウゴケン ナンブ ジシン ニヨル ハンシン チイキ ノ ヒガ
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The severest damage caused by 1995 Hyogoken-Nanbu Earthquake occurred within a narrow zone in the coastal plain between the Rokko mountains and Osaka Bay, from Kobe City to Nishinomiya City. The distribution map of the damage rate of houses indicates that the boundaries in which the damage rates change sharply lie on a straight line or segment.<br>Seismic and gravity measurements were conducted to reveal the subsurface geological structure of this coastal plain. Seismic reflection surveys were carried out along two survey lines across the zone. The gravity measurements were made at 1, 824 points, most of which have a short interval of about 25m along observation lines. The following conclusions were derived from this study.<br>(1) The seismic profiles show concealed faults below the shallow subsurface deposits in the coastal plain.<br>(2) Remarkably steep gradients of Bouguer anomalies are distributed along the boundary of the Rokko mountains and the plain.<br>(3) Estimation of the gravity structure shows that the basement dips steeply toward Osaka Bay, and that the largest step with concealed faults exists in the coastal plain.<br>The distribution of the damage rate of houses is consistent with the location of the concealed faults. In particular, the northern boundary of the severely damaged zone is situated nearly on the largest step of the basement structure. Therefore, it is concluded that the subsurface geology with concealed faults caused the seismic disaster in the coastal plain.
収録刊行物
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- 第四紀研究
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第四紀研究 35 (3), 165-178, 1996
日本第四紀学会
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詳細情報 詳細情報について
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- CRID
- 1390001206496910208
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- NII論文ID
- 10002633734
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- NII書誌ID
- AN0034136X
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- ISSN
- 18818129
- 04182642
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- NDL書誌ID
- 4019528
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可