津波地震を引き起こすプレート沈み込みダイナミクスとプレート沈み込み構造浸食


　Plate tectonics describes the lithosphere, Earth's solid outer shell, as rigid plates that interact along discrete plate boundaries. The Japanese Islands form at the juncture between the Pacific and Asian plates which is the locus of continental growth through volcanic activity and is also the site of recycling of the Earth’s crust as the Pacific plate dives beneath the Asian continental crust. This process is known as subduction, which not only recycles the Pacific oceanic crust, but also causes tectonic erosion as the Pacific plate grinds away the base of the continental crust. Tectonic erosion is a process that occurs in all convergent plate boundaries, where the plate that sinks (subducting slab) scratches and drags the plate that floats (overriding plate) removing its root, and making it smaller and smaller. This process strongly occurs in NE Japan and many researchers think that it is related to hazards: megathrust earthquakes and tsunamis. Understanding how tectonic erosion operates will help us to better prevent the dangerous effects of tsunamis and the historical and anthropological evolution of the populations living in areas like NE Japan.


2019年度～2019年度

氏名	所属
パストルガランダニエル	学際科学フロンティア研究所/東北アジア研究センター兼務教員
福島 洋	東北大学災害科学国際研究所
フローレスケネット	ニューヨーク私立大学ブルックリン校
平野 直人	東北アジア研究センター
辻森 樹	東北アジア研究センター
ガンバット アリ	東北大学理学研究科

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