Yes the Haiti Erathquake was 7.0.
Underwater Earthquakes are formed when two tectonic plates move together and create what is like a tsunami but not the same. It is like an erathquake on land but it is underwater. +++ They are underwater only because they occur in or below the Continental Shelf, part of the continent submerged and planed nearly level by sea-level rise following the end of Ice Age cold phases.