If I understand correctly, from the map of plate boundaries and direction of the plate's movement in my book, seismic activity is associated with collisional plate boundary but there is not much explanation on this beyond this. Can someone please explain more on this? Is the level of activity less than that at a conservative margin since the plates are moving less rapidly or is there actually more activity due to the extreme pressure?
Or is it simply enough to know that they're related at A level?