The government's ordered the evacuation of the entire island, as the volcano - Manaro Voui - blankets the island in ash and acid rain.
The head of the island's provincial government, Georgewin Garae, on Saturday said about 500 people had already evacuated themselves, either by chartering planes or boats.
But he said the majority of the island's 11,000 people were waiting for the government evacuation, which will start in earnest tomorrow, with ferries starting to arrive today.