Subduction zones occur at a convergent plate boundary.
At a convergent plate boundary, two tectonic plates move towards each other and collide. One of the plates is forced beneath the other and sinks into the mantle in a process called subduction. The boundary between the two plates is called a subduction zone, and it is characterized by geological features such as earthquakes, volcanic activity, and mountain building. This type of boundary is found at the edges of the Earth's tectonic plates and is responsible for much of the Earth's tectonic and volcanic activity.