Fears have grown that the Bali volcano could erupt again and leave a divesting path of destruction for residents in the danger zone.
Around 100,000 people were told to evacuate the area as experts warned about another Bali volcano eruption.
Sutopo Yuwono, from the National Disaster Mitigation Agency, warned that the island should brace for another eruption as “explosions” have already begun.
He told Channel 4 News: “The possibility of a large eruption is very high. Some indications show that there will indeed be an eruption.
“Since yesterday the eruption that happened has been accompanied by a sound of explosions and vibrations that can be heard and felt within a distance of 12km.”
The agency also said that Bali was “still safe” for tourists except for the 4.7-mile zone around Mount Agung.
A 10km exclusion zone has been put in place to protect residents from the dangerous and violent volcano.
Over the weekend, the Bali volcano sent a massive ash cloud 4,000m (13,100 feet) into the sky after months of seismic activity.
Professor David Rothery, a volcanologist at the Open University, has warned that gas trapped within Mount Agung could cause a huge explosion and pyroclastic flows if it cannot escape.
Speaking to Sky News, he said: “It’s a matter of whether that gas can escape passively, just by bubbling through the magma and cracks in the volcano.
“Or whether it builds up to such a volume of gas that it blows out explosively and drives a very high column of fragmented ash high into the sky.
“A big heavy column being driven upwards, that can then collapse down and produce these horrible pyroclastic flows which sweep across the terrain.”
Thousands of people have been left stranded because of the huge ash cloud, which has led to the cancellation of hundreds of flights.
The British Government has told nationals in Bali to heed the advice of authorities.
“Ash clouds have caused airport closure for periods in both Bali and Lombok and disruption to flights in the region,” the Government’s travel advice webpage said.
Mount Agung’s last eruption, in 1963, left more than 1,000 people dead and destroyed several villages.