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1946 Nankai earthquake
The 1946 Nankai earthquake (南海地震 Nankai jishin) was a great earthquake in Nankaidō, Japan. It occurred on December 21, 1946 at 04:19 JST (December 20, 19:19 UTC). The earthquake measured between 8.1 and 8.4 on the moment magnitude scale, and was felt from Northern Honshū to Kyūshū. It occurred almost two years after the 1944 Tōnankai earthquake, which ruptured the adjacent part of the Nankai megathrust.
==Geology==
The Nankai Trough is a convergent boundary where the Philippine Sea Plate is being subducted beneath the Eurasian Plate. Large earthquakes have been recorded along this zone since the 7th century, with a recurrence time of 100 to 200 years.
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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