地ち動どう

noun

earthquake; movement of the earth

Technical term for seismic movement or an earthquake. Used in geology and related fields.

See also: 地震

• 地ち動どうの観かん測そくデータを分ぶん析せきする。

  Analyze observation data of earth movements.

noun

motions of the earth (rotation and revolution)

Refers to the Earth's rotation and revolution. Rare, mostly found in older or technical astronomical contexts.

• 古ふるい天てん文もん学がくの文ぶん献けんでは、地ち動どう説せつの文ぶん脈みゃくで「地ち動どう」が使つかわれることがある。

  In old astronomy texts, 地動 is sometimes used in the context of the heliocentric theory.