A strong earthquake has struck off the coast of the South Pacific island nation of Papua New Guinea. There are no immediate reports of damage or injuries and no tsunami alert has been issued.
The US Geological Survey says the magnitude-7.3 quake struck on Wednesday 54 miles (87 kilometers) southwest of Lae, on the country's northern coast. The quake hit at a depth of 71 miles (115 kilometers).
The Pacific Tsunami Warning Center did not issue a tsunami alert.
Strong earthquakes are relatively common in Papua New Guinea. The country lies on the "Ring of Fire" â€” an arc of earthquake and volcanic zones that stretches around the Pacific Rim.