also: おおじしん
noun
major earthquake; large earthquake
Refers to a very strong earthquake, typically one that causes significant damage. Used in news, warnings, and general conversation.
昨夜、関東地方で大地震がありました。
There was a major earthquake in the Kanto region last night.
大地震に備えて、非常食を準備
Let's prepare emergency food in case of a major earthquake.
Compound of 大 (large) and 地震 (earthquake).