Most medium- and deep-focus earthquakes occur at
A) convergent-plate boundaries.
B) divergent-plate boundaries.
C) transform-plate boundaries.
D) hot spots.

Question

Quizplus · Accepted Answer

Medium- and deep-focus earthquakes occur at subduction zones, which are found at convergent-plate boundaries where one tectonic plate is pushed beneath another. As the subducting plate sinks into the mantle, it can cause friction and stress buildup that eventually leads to earthquakes.

Most Medium- and Deep-Focus Earthquakes Occur at