書誌事項
- タイトル別名
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- Three Dimensional P and S Wave Velocity Structure beneath the Northeastern Japan Arc
- 東北日本における地殻・上部マントルの3次元P波及びS波速度構造
- トウホク ニホン ニ オケル チカク ジョウブ マントル ノ 3ジゲン Pハ
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Three dimensional P and S waves velocity structure of the crust and the uppermost mantle beneath the northeastern Japan arc is investigated by an inversion of P and S waves arrival times observed at the seismic network of Tohoku University from local earthquakes.<br>The results show that, in the uppermost mantle, there exists a dipping high velocity zone of P and S waves which corresponds to the descending Pacific plate. Beneath active volcanoes low velocity zones of P and S waves are clearly seen, which are dipping westward and extend to a depth of about 100km.<br>Although the pattern of P wave velocity distribution is very similar to that of S wave velocity distribution, change in absolute value of S wave slowness perturbation is bigger than that of P wave slowness perturbation, indicating the spatial change in VP/VS value. Within the Pacific plate VP/VS values are generally low, whereas the low velocity zones existing beneath active volcanoes have high VP/VS values.
収録刊行物
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- 地震 第2輯
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地震 第2輯 39 (2), 201-215, 1986
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
- 1390001204304869632
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- NII論文ID
- 10006083432
- 130006786625
- 40001526378
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- NII書誌ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- HANDLE
- 10097/50910
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- NDL書誌ID
- 3090999
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- データソース種別
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可