1096 Eichō earthquake
1096 CE.
Shown on the map at 39.500°, 140.400°.
The 1096 Eicho earthquake affected the coast of Japan on 17 December during the Heian period. It is postulated by geologists to be a large megathrust earthquake along the Nankai subduction zone off southern Honshu with a magnitude between 8.0 and 8.5. The earthquake also generated a destructive tsunami with a maximum height of 7 m (23 ft).
Text from the Wikipedia article 1096 Eichō earthquake, licensed CC BY-SA 4.0.