Why deep earthquake don't occur in transform boundary?

Deep earthquakes typically occur in subduction zones, where one tectonic plate is forced beneath another, allowing for significant stress accumulation and release at greater depths. In contrast, transform boundaries involve lateral movement of plates sliding past each other, which generally results in shallower seismic activity due to the lack of a subducting plate. The absence of a descending slab in transform boundaries limits the conditions necessary for deep-focus earthquakes to develop. Thus, the tectonic processes at transform boundaries primarily generate shallow earthquakes.