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1922 Vallenar earthquake
The 1922 Vallenar earthquake occurred with a moment magnitude of 8.5 in the Atacama Region of Chile, near the border with Argentina on 11 November at 04:32 UTC.〔〔Seismological Notes, Bulletin of the Seimological Society of America. "Seismological Notes" is a list of recent important earthquakes with short summaries included in each issue of the BSSA.〕 It triggered a destructive tsunami that caused significant damage to the coast of Chile and was observed as far away as Australia.
==Tectonic setting==
The earthquake took place along the boundary between the Nazca and South American tectonic plates, at a location where they converge at a rate of seventy millimeters a year.
Chile has been at a convergent plate boundary that generates megathrust earthquakes since the Paleozoic (500 million years ago). In historical times the Chilean coast has suffered many megathrust earthquakes along this plate boundary, including the strongest earthquake ever measured. Most recently, the boundary ruptured in 2010 in central Chile.
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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