noun
natural calamity; natural disaster
Refers to catastrophic natural events such as earthquakes, floods, or volcanic eruptions. Somewhat formal or written-style.
この地域は過去に大きな地変に見舞われた。
This region has been struck by major natural calamities in the past.
地変に備えて防災訓練を行う。
We conduct disaster drills to prepare for natural calamities.