Quake of magnitude 6.3 strikes north of Puerto Rico's Isabela -USGS

An earthquake of magnitude 6.3 struck north of Isabela in Puerto Rico on Tuesday, the United States Geological Survey said.

There were no immediate reports of casualties or damage from the earthquake, which the agency said hit at a depth of 10 km (6 miles) about 80 km (50 miles) from the northwestern coastal town of Isabela.