Here's why:

* Convergent boundaries are where two tectonic plates collide. This collision causes intense pressure and friction, leading to:

* Subduction: One plate (usually denser oceanic plate) slides beneath the other. This process creates deep trenches and volcanic arcs, and generates numerous earthquakes, some of which can be very powerful.

* Continental collisions: When two continental plates collide, they buckle and fold, creating mountain ranges. This process also generates many earthquakes, although they tend to be shallower than those at subduction zones.

Other plate boundaries and their earthquake activity:

* Divergent boundaries: Where plates move apart, creating new crust. These areas have frequent but generally smaller earthquakes.

* Transform boundaries: Where plates slide past each other horizontally. These boundaries generate earthquakes that tend to be shallower and more localized.

While convergent boundaries have the most earthquakes overall, the largest and most powerful earthquakes occur primarily in subduction zones within these boundaries.