6.4-magnitude quake strikes off Tonga

A strong 6.4-magnitude quake struck off the Pacific nation of Tonga in the early hours of Monday, US seismologists said, but no tsunami warning was issued.

A strong 6.4-magnitude quake struck off the Pacific nation of Tonga in the early hours of Monday, US seismologists said, but no tsunami warning was issued.

The earthquake struck at 3:52am (1552 GMT Sunday) and occurred 197kms(122 miles) northwest of the Tongan town of Hihifo, the US Geological Survey said.

The epicentre was at a depth of 10 kilometres.

Tonga sits on the so-called Pacific Ring of Fire, a region of frequent seismic activity due to collisions between continental plates.