684 Hakuhō earthquake
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32.8°N 134.3°E / 32.8; 134.3[1] The 684 Hakuho earthquake took place in Japan in 684, and is described in the history book Nihon Shoki from the 8th century.[3] The earthquake took place on 26 November 684 (Julian calendar), in 13th year of the reign of Emperor Tenmu (Tenmu period). It caused the under-sea inundation of approximately 10 km2 (3.9 sq mi) of rice fields.[4]