A powerful 6.3-magnitude earthquake struck off Tonga early today but there was no threat of a tsunami, US seismologists said.
The offshore quake hit at 7:07 am (local time) and was centred around 124 kilometres northwest of Tonga, the US Geological Survey (USGS) said on its website.
The Hawaii-based Pacific Tsunami Warning Centre said there was no tsunami threat.
In its preliminary impact assessment, the USGS said there was a low likelihood of casualties and damage.
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