書誌事項
- タイトル別名
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- Stress Field in the Unzen Volcanic Area, Kyushu, Japan
- ウンゼン カザン チイキ ノ オウリョクバ
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抄録
Reanalyses of shallow earthquakes in the Unzen volcanic area have proved that their focal mechanisms are well explained by mormal faulting, in contrast to the previously supposed strike-slip faulting. Tension axis is in the N-S direction. Predominace of active faults, striking in the E-W direction, and forming a graben-like topography, seems to support the present model. Geodetically, crustal deformation in this area is characterized by marked N-S extension and local subsidence in the graben zone. These evidences suggest the stress system of normal fault type (tension axis is almost horizontal in the N-S direction, and pressure axis is nearly vertical) in this volcanic area, which (1) accumulated the normal fault offsets in the late Quaternary, (2) controlled the crustal deformation in the last some decades of years, and (3) caused earthquakes cccasionally. The above-stated stress system would have been closely related to the volcanism of this area, too.
収録刊行物
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- 火山.第2集
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火山.第2集 22 (1), 13-25, 1977
特定非営利活動法人 日本火山学会
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詳細情報 詳細情報について
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- CRID
- 1390282681098369920
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- NII論文ID
- 110002995062
- 10007192598
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- NII書誌ID
- AN10512786
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- ISSN
- 04534360
- 24330590
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- NDL書誌ID
- 1824829
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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
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可