海かい底てい地じ震しんかいていじしんMeanings1nounsubmarine earthquakeTechnical term for an earthquake occurring under the seafloor; may trigger tsunamis.海かい底てい地じ震しんが発はっ生せいすると、津つ波なみの危き険けんがあります。When a submarine earthquake occurs, there is a risk of tsunami.
