Strong deep Earthquakes occur at what tectonic plate borders?

Strong deep earthquakes primarily occur at convergent tectonic plate boundaries, particularly in subduction zones where one plate is forced beneath another. These zones are typically found at oceanic-continental or oceanic-oceanic boundaries, where the descending plate can generate significant seismic activity. The depth of these earthquakes can reach over 700 kilometers, with notable examples occurring along the Pacific Ring of Fire.