MELBOURNE
A second powerful earthquake has struck off the South Pacific nation of Papua New Guinea, just a couple of hours after a similar quake.
The 7.5-magnitude earthquake rattled the state in the Pacific Ocean on Saturday afternoon, the U.S. Geological Survey said.
The quake, which occurred 31 kilometers below the seabed, was centered 75 kilometers away from the mining town of Panguna on Bougainville Island close to the Solomon Islands.
The Tsunami Warning Center announced that the quake might trigger a tsunami threat, although there were no immediate reports of injuries or damage.
A 6.6-magnitude earthquake occurred in the same location on Saturday morning.
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