書誌事項
- タイトル別名
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- Three-Dimensional <i>Q<sub>s</sub></i> Structure in the Northeastern Japan Arc
- 東北日本弧の三次元Qs値構造
- トウホク ニホンコ ノ 3ジゲン Qsチ コウゾウ
- Three-Dimensional Qs Structure in the Northeastern Japan Arc
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抄録
Three-dimensional anelasticity (Qs-1) structure of the upper mantle beneath the northeastern Japan arc is obtained using spectral amplitude ratio of P and S waves observed by the seismic network of Tohoku University. An S-to-P spectral ratio technique is adopted to avoid dependance on the source spectra of the earthquakes used here, assumingQp/Qs to be 2.25. The crust and upper mantle are divided into many rectangular blocks, and an anelasticity parameter of each block is deduced by using the damped least squares method.<br>The anelasticity structure of the crust and upper mantle beneath the northeastern Japan arc consists of an extremely high-Q (Qs≅1500) inclined oceanic plate and a relatively low-Q land-side region which can be divided into two zones: an intermediate-Q (Qs≅500-800) land-side mantle between the Pacific coast and the volcanic front, and a low-Q (Qs≅150) land-side mantle between the volcanic front and the coast of the Japan Sea. Moreover extremely low-Q zones exist in the crust beneath the active volcanoes.
収録刊行物
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- 地震 第2輯
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地震 第2輯 37 (2), 217-228, 1984
公益社団法人 日本地震学会
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詳細情報 詳細情報について
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- CRID
- 1390282679279852800
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- NII論文ID
- 130006783527
- 10003668577
- 40001526255
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- NII書誌ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
- http://id.crossref.org/issn/00371114
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- NDL書誌ID
- 2992495
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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