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A 6.3-magnitude earthquake struck Tuesday in the Bismarck Sea about 200 kilometres (120 miles) off Papua New Guinea's coast, the US Geological Survey said.

A preliminary USGS assessment said there was a "low likelihood of casualties and damage from the quake", which had an estimated depth of 10 kilometres. There were no tsunami warnings.

Papua New Guinea sits on the so-called Pacific Ring of Fire, which is a hotspot for seismic activity due to friction between tectonic plates.

A 7.5-magnitude quake that hit the rugged highlands region in February 2018 triggered landslides, burying homes and killing at least 125 people.

Source: AFP