According to USGS, the new tremor's epicentre was 30 kilometres west of the capital, at a shallow depth of 4.1 kilometres.
"I felt a shake, it was brief, just a few seconds," Patrice Dumont, a school teacher was quoted by news agency as saying.
"I heard a sound like a grumbling, then a drumbeat, as if something wanted to burst from the belly of the earth," he added.
It was not immediately clear whether the latest quake caused any damage or casualties.
On Jan 12, the Haitian capital was devastated by a 7.0 earthquake that killed more than 1,50,000 people and hundreds of thousands made homeless.