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Kamchatka earthquakes
Three earthquakes, which occurred off the coast of Kamchatka Peninsula in far eastern Russia and the Soviet Union in 1737, 1923 and 1952, were megathrust earthquakes and caused tsunamis. They occurred where the Pacific Plate subducts under the Okhotsk Plate at the Kuril-Kamchatka Trench. The depth of the trench at the point of the earthquakes is 7,000–7,500 m. Northern Kamchatka lies at the western end of the Bering fault, between the Pacific Plate and North American Plate,〔(Kamchatka: Edge of the Plate )〕 or the Bering plate〔Pedoja, K., Bourgeois, J., Pinegina, T., Higman, B., 2006. Does Kamchatka belong to North America? An extruding Okhotsk block revealed by coastal neotectonics of the Ozernoi Peninsula, Kamchatka, Russia, Geology, v. 34(5), pp. 353–356.〕 There are many more earthquakes and tsunamis originating from Kamchatka, of which the most recent was the 1997 Kamchatka earthquake and tsunami originating near the Kronotsky Peninsula.
==1737 earthquake==
The epicentres of the 1737 earthquake was located at . This earthquake occurred at a depth of 40 km. A magnitude of 8.3 Ms (9.0Mw) has been estimated.〔(Page on tsunami associated with event from West Coast and Alaska warning center )〕
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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