What type of tectonic plate boundary is most closely associated with the occurrence of earthquakes?

The type of tectonic plate boundary most closely associated with the occurrence of earthquakes is indeed found across all types of boundaries. At convergent boundaries, where one plate is forced beneath another, significant stress can build up, leading to powerful earthquakes. This often occurs in subduction zones, where an oceanic plate descends into the mantle beneath a continental or another oceanic plate, resulting in both seismic activity and volcanic eruptions.

At divergent boundaries, where two plates are moving apart, earthquakes can occur as new crust forms and the plates adjust to changes in stress. The Mid-Atlantic Ridge is a prime example, where the movement of tectonic plates creates smaller earthquakes as they break apart and allow magma to rise.

Transform boundaries, in which plates slide past each other horizontally, are also notable for their earthquake activity. The friction that builds between the plates can release suddenly, resulting in significant seismic events, such as those seen along the San Andreas Fault in California.

Therefore, earthquakes are a common phenomenon at all types of tectonic plate boundaries due to the movement and interaction of the plates, highlighting the dynamic nature of the Earth's lithosphere.