As dense seafloor is subducted, it penetrates the surrounding mantle and ruptures it causing the largest earthquakes.as the mantle fractures.

Question

Quizplus · Accepted Answer

The largest earthquakes are primarily caused by the movement of tectonic plates at their boundaries, not by the subducting seafloor rupturing the mantle. Subduction can lead to large earthquakes, but these occur in the crust and upper mantle, not by the subducting plate rupturing deep into the mantle.

As Dense Seafloor Is Subducted, It Penetrates the Surrounding Mantle