The fourth strong tremor near Papua New Guinea a week prompted a temporary tsunami warning for the region.
A strong 7.2 earthquake shook the Pacific island nation of Papua New Guinea Thursday 90 miles (150 km) southwest of the Bougainville Island's town of Arawa, the U.S. Geological Survey reported.
The epicenter of the quake was at a shallow depth of six miles (10 km), triggering a tsunami warning that was later lifted once the threat was deemed to have passed.
No damages have been reported.
Thursday's quake follows a series of moderate to strong tremors in the past week, including a 7.4-magnitude earthquake off the southern coast of the New Britain island on Tuesday.
Papua New Guinea is located in the most active seismic region of the world, the Pacific Ring of Fire, which registers close to 7,000 moderate earthquakes every year.