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| October 2010 Sumatra earthquake ： ウィキペディア英語版 |
October 2010 Sumatra earthquake and tsunami
The October 2010 Sumatra earthquake occurred with a moment magnitude of 7.7 〔 on 25 October off the western coast of Sumatra at 21:42 local time (14:42 UTC). The earthquake occurred on the same fault that produced the 2004 Indian Ocean earthquake. It was widely felt across the provinces of Bengkulu and West Sumatra and resulted in a substantial localized tsunami that struck the Mentawai Islands.
==Tectonic setting==
The island of Sumatra lies above the Sunda megathrust, the interface between the subducting Australian Plate and the overriding Sunda Plate. Movement on this structure has been responsible for many large historical megathrust earthquakes. The most recent sequence of large ruptures started with the 2004 Indian Ocean earthquake and included the 2005 Sumatra earthquake and the 2007 Sumatra earthquakes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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