Port Vila: A 6.4-magnitude quake hit the Santa Cruz islands in the South Pacific on Friday, seismologists said, a day after a series of huge quakes sparked a region-wide tsunami alert.
The quake struck at a depth of just 9.4 kilometres (six miles) about 315 kilometres northwest of the Luganville, part of the Vanuatu archipelago, at 8:16am (2116 GMT) but no tsunami warning was immediately issued.
The region has been pummelled by some 20 aftershocks after Thursday's triple tremors measuring 7.6, 7.8 and 7.3 sparked a tsunami warning for much of the South Pacific, sending thousands of residents fleeing from the coast.
The Pacific is still recovering from last week's 8.0-magnitude earthquake and huge tsunami which crashed into Samoa, American Samoa and Tonga, wiping out villages and resorts and killing 184.
Samoa was holding a national day of mourning including a ceremony at Apia stadium and a mass funeral for 11 of the victims.