The Haiti earthquake of 2010 was caused by the movement of the North American Plate and the Caribbean Plate.

The specific location of the earthquake was on a transform fault called the Enriquillo-Plantain Garden fault zone. This fault zone is where the two plates slide past each other horizontally.

Here's a breakdown:

* North American Plate: This plate is moving westward relative to the Caribbean Plate.

* Caribbean Plate: This plate is moving eastward relative to the North American Plate.

The slippage along this fault zone is what caused the earthquake, releasing a tremendous amount of energy that devastated Haiti.