The timing of the disaster over the Christmas season evoked memories of the Indian Ocean tsunami triggered by an earthquake on Dec 26, 2004, which killed 226,000 people in 14 countries, including more than 120,000 in Indonesia.

Families streamed out of the area on Monday for fear of further tsunami, jamming roads already blocked by debris.

Fishermen told how a light breeze was followed by a huge wave that smashed together wooden fishing boats moored off the coast and pulled down the trees they were tied to.

Excavators were being used to move debris including piles of steel roofing tangled like spaghetti. Medics were sent in with the military, while groups of police and soldiers reached remote areas.