MORE THAN 150,000 passengers have been left stranded following the closure of several airports in Indonesia, after Mount Anak Krakatoa erupted on Saturday.

The volcano spewed a fountain of ash and lava and great booming sounds that could be heard up to a few hundred kilometres away, the geology agency said in a statement.

Two new eruptions were recorded on Sunday, the volcanology agency warned.

Ash from the volcano was detected in the airspace surrounding Soekarno-Hatta International Airport, prompting authorities to initially suspend operations from 1.30 am on Sunday (Saturday 6.30pm Irish time) to 5.30am.

A man clears volcanic ash from his car following the eruption of Mount Anak Krakatoa in September 2026. Alamy Stock Photo Alamy Stock Photo

The suspension was extended several times, with the latest set to end at 9.30pm (3.30pm) on Sunday, the local airport authority said in a social media post.

Operations have also been suspended at seven other airports including the Husein Sastranegara airport in Bandung and Radin Inten II airport near Bandar Lampung on Sumatra, the transportation ministry said in a statement.

“From the closures, it is known that more than 150,000 passengers were stranded, with 467 flights affected, consisting of 58 international flights and 409 domestic flights,” the ministry said.

Several airports in cities including Semarang and Surabaya have been prepared as “alternatives for landing,” Transportation Minister Dudy Purwagandhi said.

Passengers scrambling

The disruption left some passengers scrambling to find alternative flights.

Henny Yensan (44), who had hoped to go back to her hometown with her mother, said “everybody was disappointed”.

“No one flew into a rage because after all, this is due to natural disaster,” the businesswoman who had to reschedule her flight to Tuesday, told AFP.

Samuel Guiberteau, a Danone executive on a business trip to Lombok since Friday, said “nothing is certain for the moment”, as he searched for alternative flights back to the capital.

“I had found another flight on Citilink, but it was also cancelled,” the 47-year-old told AFP by phone, adding that he had no alternative but to stay in Lombok for the time being.

Volcanic ash had also reached the city of Bandar Lampung in the southern tip of Sumatra, blanketing parked cars and roadsides.

“I’m worried it could seriously affect the lungs and cause a lung infection,” Andre Bayu Saputra, 25, told AFP on Sunday.

Schools across Jakarta will be closed on Monday as classes will move online, the city said in a statement, without specifying how long the measure will be in place.

Hazard warning 

Anak Krakatoa, which means Child of Krakatoa, sits in a strait that separates the islands of Java and Sumatra.

Krakatoa erupting in 2018. Alamy Stock Photo Alamy Stock Photo

Ships passing through the strait were asked to increase vigilance for possible disruption to navigation safety due to volcanic activities.

Vessels are prohibited from approaching an exclusion zone of three kilometres radius from the volcano, local port authorities said in a statement.

The volcano has been sporadically active since it emerged from the sea at the beginning of last century in the caldera that formed after the 1883 eruption of Mount Krakatoa.

That disaster was one of the deadliest and most destructive in history with an estimated 35,000 people killed.

Geology agency head Lana Saria said “seismic activity indicates the movement or release of volcanic fluids within the volcanic system”.

“However, the timing, magnitude, and nature of the next eruption cannot be precisely predicted,” Lana added.

Lana warned against approaching Anak Krakatoa, saying materials ejected from the volcano could endanger those within the exclusion zone.

She said the most recent series of eruptions do not have the potential to trigger a tsunami at this time.

A view of Carita village after the tsunami hit on December 29, 2018 in Pandeglang regency, Banten Province. Alamy Stock Photo Alamy Stock Photo

A 2018 tsunami triggered by a collapse of parts of Anak Krakatoa killed 429 people and left thousands displaced.

Indonesia, a Southeast Asian archipelago nation, sits on the Pacific Ring of Fire, where the meeting of continental plates causes high volcanic and seismic activity.