thats a crazy amount of aftershocks, especially being almost all 5+. this could suggest that the original 7.5 moved a lot of earth, and put a lot of pressure on the plate next to it. the weaker interactions are failing from the pressure and it could only be a matter of time before theres a really big one when the pressure is released. these could be foreshocks.
loyalty island aftershocks keep coming. even a 6.4