Indonesia‘s transportation ministry said on Tuesday it will extend the closure of Bali’s I Gusti Ngurah Rai International Airport for a further 24 hours because of ash from the eruption of the island’s Mount Agung volcano.
A report from local aviation navigation authorities showed that “aircraft flight channels are covered with volcanic ash” the ministry said in a statement.
READ MORE: Bali volcano: Canadians among 100,000 ordered to flee erupting Mount Agung
Bali airport, about 60 km (37 miles) from the volcano, will be closed until 7 a.m. local time on November 29, it said.
Ten alternative airports have been prepared for airlines to divert inbound flights, including in neighbouring provinces.
WATCH: Bali village coated in ash, mud rushes into river as Mount Agung volcano continues to erupt
A separate notice showed Lombok airport had been reopened, after an earlier closure overnight due to the eruption.
Agung rises majestically over eastern Bali to a height of just over 3,000 metres (9,800 feet).
READ MORE: Bali volcano alert raised to highest level, 100K people ordered to evacuate immediately
On Monday, authorities ordered 100,000 residents living near the volcano to evacuate immediately, warning that the first major eruption in 54 years could be “imminent”. An 8-10 km (5-6 miles) exclusion zone has been imposed around the summit.
Agung’s last eruption in 1963 killed more than 1,000 people and razed several villages by hurling out pyroclastic material, hot ash, lava and lahar.
WATCH: Timelapse of Bali’s Mount Agung erupting
On Tuesday, life continued largely as normal in villages surrounding Agung, with residents setting up traditional markets and offering prayers as the volcano continued to spew tall columns of ash and smoke from its crater.
READ MORE: Mount Agung volcano dusts Bali resorts and villages in ash
Many residents evacuated in September when the alert was last raised to the highest level have returned to their homes and farms due to worries over their livelihood and livestock.
Indonesia’s Volcanology and Geological Disaster Mitigation Centre (PVMBG), which is using drones, satellite imagery and other equipment, said predictions were difficult in the absence of instrumental recordings from the last eruption 54 years ago.
It warned that if a similar eruption occurred, it could send rocks bigger than fist-size up to 8 km (5 miles) from the summit and volcanic gas a distance of 10 km (6 miles) within three minutes.
Recordings now show the northeast area of Agung’s peak has swollen in recent weeks “indicating there is fairly strong pressure toward the surface”, PVMBG said.