On the ninth of this month, a tsunami was noticed on the Pacific coast of Tokyo. Regarding the earthquake whose epicenter was close to Torishima within the Izu Islands, the federal government’s Earthquake Investigation Committee stated that the trigger was unknown, however that not less than 14 earthquakes had occurred. We have summarized our opinion that “tsunamis are generated on this space even by comparatively small earthquakes, so we must be cautious in the intervening time.”

