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北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
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Title: 2010年12月2日に札幌市直下で発生した石狩地方中部の地震(MJMA4.6)と札幌周辺の地震活動
Other Titles: Seismic Activity Associated with the 2010 M4.6 Sapporo Earthquake in central Ishikari region, Hokkaido
Authors: 一柳, 昌義1 Browse this author
山口, 照寛2 Browse this author
高田, 真秀3 Browse this author
東, 龍介4 Browse this author
黒井, 和典5 Browse this author
山田, 卓司6 Browse this author
高橋, 浩晃7 Browse this author
前田, 宜浩8 Browse this author
Authors(alt): Ichiyanagi, Masayoshi1
Yamaguchi, Teruhiro2
Takada, Masamitsu3
Azuma, Rysuke4
Kuroi, Kazunori5
Yamada, Takuji6
Takahashi, Hiroaki7
Maeda, Takehiro8
Issue Date: 19-Mar-2013
Publisher: 北海道大学大学院理学研究院
Journal Title: 北海道大学地球物理学研究報告
Journal Title(alt): Geophysical bulletin of Hokkaido University
Volume: 76
Start Page: 1
End Page: 13
Abstract: On December 2, 2010, MJMA4.6 shallow felt earthquake occurred beneath southeastern part of Sapporo city. Three temporal seismic stations were installed near epicentral area. Reliable hypocenter data estimated by double difference procedure with local seismic velocity structure indicated clear southeastern-dipping distribution. Fault plane from focal mechanism estimated from P-wave polarization well agreed with this hypocenter distribution. Geometry of hypocenter distribution was also well consistent with an anticline structure and possible buried active fault estimated for earthquake disaster damage assumption by local government. Recalculation of hypocenters of the 1985, 1990, and 2010 felt earthquakes under equal condition implied that epicentral locations of these three events were approximately same. These facts implied possible stress concentration in epicentral region.
Type: bulletin (article)
Appears in Collections:北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第76号

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