noun
tectonic activity
Geological term referring to the movement and deformation of the Earth's crust, including earthquakes, volcanic activity, and mountain building.
日本列島は地質活動が活発な地域です。
The Japanese archipelago is a region of active tectonic activity.
地質活動によって新しい山脈が形成される。
New mountain ranges are formed by tectonic activity.
Compound of 地質 (geological features) and 活動 (activity). The term is a direct translation of the English 'tectonic activity' and is used primarily in scientific contexts.