A strong earthquake with a preliminary magnitude of 7.8 struck Bougainville, Papua New Guinea, on Wednesday, Japan’s Central Meteorological Agency said. There were no immediate reports of casualties or damage.
An aftershock with a preliminary magnitude of 7.2 rocked the same region Thursday, the agency said.
The first quake was centered at a depth of about 18-1/2 miles in the Solomon Sea, some 35 miles north of Sohano, a town on the island of Bougainville. It occurred at 7:35 p.m. (6:35 a.m. EDT), the agency said.
The second quake struck at 8:18 a.m. Thursday, it said.
Smaller aftershocks also jolted the area. An agency official said there was no danger of tsunamis, seismic waves caused by undersea disturbances such as earthquakes or volcanic activity.
A magnitude 7.8 quake is capable of causing widespread damage in populated areas.