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  1. 060 工学部
  2. 0601 学術論文

SOURCE CHARACTERISTICS OF SHALLOW EARTHQUAKES IN THE NORTHERN PART OF SANRIKU-OKI REGION, JAPAN

http://hdl.handle.net/10091/14204
http://hdl.handle.net/10091/14204
e1d6b17a-cbed-45ef-9e59-f02f936aa013
名前 / ファイル ライセンス アクション
1978_Izutani_Hirasawa_JPE.pdf 1978_Izutani_Hirasawa_JPE.pdf (1.9 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2012-03-13
タイトル
言語 en
タイトル SOURCE CHARACTERISTICS OF SHALLOW EARTHQUAKES IN THE NORTHERN PART OF SANRIKU-OKI REGION, JAPAN
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 IZUTANI, Yasuo

× IZUTANI, Yasuo

WEKO 37896

IZUTANI, Yasuo

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HIRASAWA, Tomowo

× HIRASAWA, Tomowo

WEKO 37897

HIRASAWA, Tomowo

Search repository
信州大学研究者総覧へのリンク
氏名 IZUTANI, Yasuo
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.HFSpZVkh.html
出版者
出版者 CENTER ACADEMIC PUBL JAPAN
引用
内容記述タイプ Other
内容記述 Journal of Physics of the Earth. 26(3):275-297 (1978)
書誌情報 Journal of Physics of the Earth

巻 26, 号 3, p. 275-297, 発行日 1978
抄録
内容記述タイプ Abstract
内容記述 Six shallow earthquakes, which occurred in the Sanriku-Oki region during the period from 1965 to 1970, are studied by using long-period P-and S-waves. Focal mechanism solutions are determined from the S-wave polarization angles. Fault planes, which are distinguished from the auxiliary planes by means of the hypocenter distribution of aftershocks, are slightly dipping toward the island arc. A linear correlation is found between the dip angle of fault plane and the distance of epicenter from the trench axis; the dip angle increases with increasing distance. The motion directions of the foot wall blocks relative to the hanging wall sides are in the range from N58°W to N72°W and are consistent with the expectation from the plate tectonics theory, the motion direction of the Pacific plate relative to the Eurasia plate. The focal depths re-determined by the use of depth phases such as pP and sP reveal that the hypocenters of the six earthquakes lie almost on a plane slightly dipping toward the island arc. The spectral analysis of P-waves is made to elucidate the dynamic source process. To do this, the effects of multiple reflection in the crust near the source region as well as beneath the station are taken into account. A unilateral bidirectional model of faulting appropriate to each event is determined by comparing the trough frequencies in the observed P-wave spectra with those expected theoretically. The fracture is found to have propagated in the motion direction of the foot wall block with a velocity between 2.0 and 3.1km/sec.
資源タイプ(コンテンツの種類)
内容記述タイプ Other
内容記述 Article
ISSN
収録物識別子タイプ ISSN
収録物識別子 0022-3743
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00704960
DOI
識別子タイプ DOI
関連識別子 https://doi.org/10.4294/jpe1952.26.275
関連名称 10.4294/jpe1952.26.275
権利
権利情報 Copyright© 1978 The Seismological Society of Japan; The Geodetic Society of Japan; The Volcanological Society of Japan
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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