How do the locations of earthquakes relate to the earth's plates?

When plates collide or slide apart, earthquakes can be caused.

"There's really only one explanation for all of the questions about tectonic plates popping up... Why not just do your own homework? It would work a lot faster than waiting for some other random person to do it for you. Alas, (wow I just said "alas") I still answered the question for you..." - anh1227