We can look at the aftershocks and see that an M7.2 is exactly 60 km long.
If we look at the history in about the 1700's we see there is a sequence of earthquakes that is in accord with physics.
My arrows are big. If they are only M7 then its a lot to get all the way to Jamaica. That's why I think they'll be M8's. But I'm not looking up the history again. Been there, done that.