Along plate boundaries: Earthquakes most frequently occur along the boundaries between tectonic plates. These boundaries are where the plates interact with each other, and where the stresses and forces that cause earthquakes are concentrated.

- Convergent boundaries: When two plates collide, the denser plate is usually forced beneath the less dense plate, creating a subduction zone. Subduction zones are often marked by deep oceanic trenches and volcanic activity, as well as intense seismic activity.

- Divergent boundaries: When two plates move away from each other, the crust thins and cracks, forming a rift valley. As the plates continue to move apart, new crust is created in the rift valley, and earthquakes can occur along the margins of the rift.

- Transform boundaries: When two plates slide past each other, the friction between the plates can generate earthquakes. These earthquakes are often shallower than those at convergent or divergent boundaries, and they can cause significant damage in populated areas.