Why there was no tsunami after Haiti's earthquake?

Answer 1

Haiti's earthquake was not strong enough to produce a tsunami. The earthquake caused a lot of destruction in Haiti, but that was largely because the buildings in Haiti had not been designed to withstand earthquakes.

The earthquake in Haiti had its epicentre on LAND not in the ocean. Thus there was no sea floor movement associated with the earthquake which could have produced a tsunami.

Answer 2

The earthquake in Haiti occurred on a strike-slip fault, where the plates move horizontally instead of vertically. Since tsunamis are typically generated by vertical movement of tectonic plates, this sideways motion did not displace water vertically, preventing the formation of a tsunami.