Another powerful quake struck near Kirakira this morning - a 6.7 magnitude quake at a depth of 33km.
The undersea quake hit 71km west of the city of Kirakira, which is on the country's biggest island, Makira.
National Disaster Management Office director Loti Yates said there was no tsunami threat from this morning's quake but he was expecting more reports of damage.
Mr Yates said multiple quakes of magnitude 5 and above have hampered relief operations still under way in the Makira area.
