A moderate 5.4-magnitude earthquake struck Vanuatu in the South Pacific on Monday, the US Geological Survey (USGS) said.
Its epicentre was located 98 kilometres south-southwest of the capital Port-Vila at 5.15am, it said. The quake struck at a depth of 15 kilometres.
No tsunami warning was immediately issued as a result of the tremor.
An 8.0-magnitude earthquake and huge tsunami crashed into Samoa, American Samoa and Tonga in September last year, wiping out villages and resorts and killing 184 people.