Australian, Canadian and US warships are helping with evacuations and supplying support after some tremors to the New Zealand town of Kaikoura.
About 600 people were evacuated on Wednesday by air and sea.
Workers additionally created crisis road access to the town, which continues to be cut off by landslides.
Two people were killed when the region was hit by a severe earthquake shortly after midnight on Monday, followed by thousands of aftershocks.
About 3,500 people live in the town and surrounding region.
The nation has been hit by at least 1,823 earthquakes since the magnitude 7.8 quake on Monday, according to GeoNet, New Zealand’s government-funded earthquake observation service.
Engineering consulting firm Tonkin and Taylor, which continues to be employed by the New Zealand authorities to evaluate damage to Kaikoura, told the BBC the damage in the area was “catastrophic”.
But the firm said damage to residential housing was “not too bad”.
