神戸大学附属図書館デジタルアーカイブ
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https://hdl.handle.net/20.500.14094/90004315
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2024-04-26
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90004315 (fulltext)
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メタデータID
90004315
アクセス権
open access
出版タイプ
Version of Record
タイトル
Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations
著者
Ito, Aki ; Sugioka, Hiroko ; Obana, Koichiro ; Hino, Ryota ; Suetsugu, Daisuke ; Nakahigashi, Kazuo ; Shinohara, Masanao ; Nakano, Masaru ; Yamamoto, Yojiro
著者名
Ito, Aki
著者ID
A0743
研究者ID
1000000359184
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=1b8c37d273204c78520e17560c007669
著者名
Sugioka, Hiroko
杉岡, 裕子
スギオカ, ヒロコ
所属機関名
理学研究科
著者名
Obana, Koichiro
著者名
Hino, Ryota
著者名
Suetsugu, Daisuke
著者名
Nakahigashi, Kazuo
著者名
Shinohara, Masanao
著者名
Nakano, Masaru
著者名
Yamamoto, Yojiro
収録物名
Earth, Planets and Space
巻(号)
69
ページ
30-30
出版者
SpringerOpen
刊行日
2017-02-09
公開日
2017-11-08
抄録
We determined hypocenter distributions and focal mechanisms of earthquakes off the Boso Peninsula, Japan, based on seafloor observations using ocean-bottom seismometers (OBSs). From OBS data, we detected and located earthquakes that were closer to the trenches than had previously been reported. The determined focal depths of relocated hypocenters were systematically shallower than those in the Japan Meteorological Agency catalog determined from land-based data. The hypocenter distribution was separated into two groups: one associated with the Pacific plate (PAC) and the other with the North American and/or Philippine Sea plates (PHS). For the former group, both the focal depths and mechanisms of low-angle thrust-faulting earthquakes were consistent with the geometry of the PAC determined by previous studies. Among the latter group, we selected low-angle thrust-faulting earthquakes with a slip direction parallel to the direction of PHS subduction or with a dip direction parallel to the PHS to delineate the upper boundary of the PHS. The depth of the plate upper boundary off the Boso Peninsula was found to be approximately 6 km shallower than previously reported estimates.
カテゴリ
理学研究科
学術雑誌論文
権利
© The Author(s) 2017.
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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資源タイプ
journal article
言語
English (英語)
eISSN
1880-5981
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関連情報
DOI
https://doi.org/10.1186/s40623-017-0608-4
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