The jolts were reportedly registered at 04.18 GMT at a shallow depth of 10 kilometres (6 miles) and about 155 kilometres (95 miles) east-southeast of the Loyalty Islands off New Caledonia's east coast. The PTWC has warned of possible powerful tsunamis in the region. The authorities have urged residents to take shelter and have organised an immediate evacuation.
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According to the US Geological Survey (USGS), there have been no reports of casualties or damage caused by the earthquake so far.