A strong earthquake has struck the South Pacific island nation of Papua New Guinea.

The U.S. Geological Survey says the 7.1 magnitude earthquake hit about 89 kilometers southwest of the country second largest city, Lae. The strong tremor, initially rated as a 7.3 magnitude, struck at a depth of about 115 kilometers.

The Pacific Tsunami Warning Center has not issued a tsunami alert. No injures or major damages are being reported.

About 221 kilometers away from the epicenter, residents of the capital Port Moresby reported feeling the quake. Witnesses are saying buildings shook in the capital for more than a minute.

Papua New Guinea sits on the Ring of Fire, an arc of active earthquake and volcanic zones that sits on the Pacific rim.