The Directorate of Civil Protection (DPC) said that the quake was felt across several parts of the French-speaking Caribbean Community (CARICOM) country and that it created panic in several cities. It was 7.3 miles (11.7 kilometers) below the surface.
Prime Minister Jean-Henry Céant said a crisis cabinet has been created to coordinate all emergency responses to the natural disaster.
Authorities said more than 100 people were also injured when several buildings collapsed.
An quake has struck off the northern coast of Haiti, killing at least 11 people and injuring more than a hundred when several buildings collapsed in the impoverished Caribbean country, officials said.
According Secretary of State for Communications Eddy Jackson Alexis, a preliminary report indicated that 11 people had died and 135 injured.
The Haitian civil protection agency said there was no tsunami warning following the quake, which was felt across the country.
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He said Amazon needs to communicate to workers better if overall compensation is higher "or you're going to have morale problems". Workers in different parts of the world went on strike during the company's Prime Day promotion over the summer.
The civil protection agency issued a statement saying that some houses were destroyed in Port-de-Paix, Gros-Morne, Chansolme and Turtle Island.
It was felt lightly in the capital, as well as in the neighboring Dominican Republic and in eastern Cuba, where no damage was reported.
It was not immediately clear if any additional injuries or damage occurred as a result of the shock, which struck as emergency teams were bringing relief to victims of Saturday's quake.
The Miami Herald said however that at least seven people had been killed. Tens of thousands remain in makeshift camps.
The devastating 7.0-magnitude quake in January 2010 left more than 1.5 people homeless.
The damage caused was worth an estimated 120 percent of GDP in Haiti, the poorest country in the western hemisphere.