On December 23 , 1854 , the Ansei Tokai earthquake , with an estimated magnitude of 8.4 on the Richter magnitude scale , shook Japan and surroundings . A 7-meter-high tsunami destroyed most of Shimoda including Putiatin 's ships , with the exception of '' Diana '' , which was badly damaged and which soon sank as she attempted to sail to Heda for repairs
Ansei Tokai earthquake
1854 Tōkai earthquake
Treaty of Shimoda