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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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斜め衝突帯の巨大地震 (1) 相模トラフ

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Please use this identifier to cite or link to this item:https://doi.org/10.14943/gbhu.75.161

Title: 斜め衝突帯の巨大地震 (1) 相模トラフ
Other Titles: Megathrust Earthquakes in Oblique Subduction Zones Part 1: The Sagmi Trough
Authors: 小山, 順二1 Browse this author
都筑, 基博2 Browse this author
蓬田, 清3 Browse this author
Authors(alt): koyama, Junji1
Tsuzuki, Motohiro2
Yomogida, Kiyoshi3
Issue Date: 19-Mar-2012
Publisher: 北海道大学大学院理学研究院自然史科学部門(地球物理学)
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: 75
Start Page: 161
End Page: 174
Abstract: Since the 2011 Tohoku-oki megathrust earthquake, Japan, it has been recognized that there is a variety of megathrust earthquakes occurring in the world not just only the Chilean type megathrust earthquake. In the variation, one end member is the 1960 Chile earthquake and the other is the 2004 Sumatra-Andaman earthquake, while the former is characterized by subduction zone of a young plate forming the Cordilleran orogeny, the latter is by an obliquely subducting plate along a continental margin with active back-arc activity. We study in detail megathrust earthquakes along such oblique subduction zones, considering characteristics of earthquake activities, focal mechanisms, rupture patterns, geometry of subduction zones, types of overriding plates and back-arc activities. Discussions are further made on one of the oblique subduction zones near Japan Islands, the Sagami Trough, in order to derive some information and the possibility of future large earthquakes there from the seismological data at hand. We found that there is a variety of large earthquakes in the oblique subduction zones in the world. Since we have no hand to suspect the future activity of a particular subduction zone, comparative studies on seismic activities in different oblique subduction zones are inevitable.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/49079
Appears in Collections:北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第75号

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