From the same waters that swallowed Krakatoa's fury in 1883, its volcanic heir has stirred again — this time sending invisible clouds of ash drifting more than 150 kilometers to silence one of Southeast Asia's busiest airports. On Sunday, Soekarno-Hatta International suspended all operations as Mount Anak Krakatau's plumes climbed to 15,000 meters, grounding dozens of flights and reminding the modern world that the earth's oldest forces still set the terms. The disruption was not born of human error or political will, but of geology — patient, indifferent, and vast.
Jakarta airport suspends flights as Anak Krakatau eruption spreads volcanic ash
Safety remains the top priority in every operational decision
Mark
Why does volcanic ash actually matter for planes? It seems like it should just blow past.
Mimi
Ash particles are abrasive and extremely hot. They can melt inside jet engines, clog fuel systems, and coat windscreens so pilots can't see. It's not just visibility—it's mechanical damage.
Luke
Right, and that's why the airport did the paper test at 12:35am. They needed to confirm ash was actually present before extending the closure. It wasn't just a precaution; they had evidence.
Mark
How far away is Anak Krakatau from Jakarta?
Mimi
Over 150 kilometers. The fact that ash reached the airport at all shows how powerful the eruption was—the plume went up 15,000 meters on the Sumatra side.
Luke
Though we should note the source doesn't specify exactly how much ash reached the airport itself, just that it was detected there. The concentration matters for how long the closure needs to last.
Mark
What's the history here? Is this volcano known for being dangerous?
Mimi
It emerged from the sea in the 1920s, growing in the crater left by the 1883 Krakatoa eruption, which was catastrophic. In 2018, it erupted again and triggered a tsunami that killed over 400 people.
Luke
So there's precedent for real danger. Though this time the disaster agency said no tsunami risk. That's important—it means the hazard is localized to the ash, not a broader regional threat.
Mark
How many people were actually affected by the airport closure?
Mimi
The first suspension affected 33 flights—16 international cancellations and seven delays. Singapore Airlines alone had to cancel two flights and delay two more.
Luke
We don't have a passenger count, though. Thirty-three flights could mean hundreds or thousands of people, but the source doesn't give us that number. We know the disruption happened; we just don't know its full scale in human terms.
The Pulse
- Anak Krakatau erupted violently beginning Friday, with lava fountains and sonic booms audible 700 kilometers across open ocean, signaling a serious and escalating event.
- By Sunday, ash columns had reached 15,000 meters and drifted over Jakarta, coating the runways of Soekarno-Hatta and forcing a full suspension of flight operations.
- A technical 'paper test' conducted in the early hours confirmed ash presence at the airport, pushing the reopening deadline from 5:30am to 1:30pm and deepening the disruption.
- Dozens of flights were cancelled or delayed — including international services by Singapore Airlines — leaving passengers stranded across one of Asia's most trafficked aviation corridors.
- Authorities confirmed no tsunami risk this time, but volcanic ash remains a critical hazard capable of destroying jet engines, making the grounding a necessary and costly precaution.
- Meteorological, aviation, and disaster agencies remain in coordinated watch, waiting for conditions to clear before restoring the flow of people and commerce through the region.
From the same waters that swallowed Krakatoa's fury in 1883, its volcanic heir has stirred again — this time sending invisible clouds of ash drifting more than 150 kilometers to silence one of Southeast Asia's busiest airports. On Sunday, Soekarno-Hatta International suspended all operations as Mount Anak Krakatau's plumes climbed to 15,000 meters, grounding dozens of flights and reminding the modern world that the earth's oldest forces still set the terms. The disruption was not born of human error or political will, but of geology — patient, indifferent, and vast.
On Sunday morning, Indonesia's Soekarno-Hatta International Airport — the vast hub connecting Jakarta to the world — suspended all flight operations after volcanic ash from Mount Anak Krakatau drifted more than 150 kilometers over the capital. The eruption had begun late Friday, with lava fountains and thunderous booms carrying across the ocean for 700 kilometers. By Sunday, two further eruptions had sent ash columns rising to 6,000 meters on the Java side and as high as 15,000 meters toward Sumatra and Banten province.
Airport officials had initially hoped to resume operations at 5:30 in the morning, but a pre-dawn technical assessment — a so-called paper test — confirmed ash was present on the ground. The suspension was extended to 1:30 in the afternoon. The director general of civil aviation cited safety as the governing principle behind every operational decision.
The consequences spread quickly through the aviation network. An earlier suspension had already cancelled 16 international flights and delayed seven more. Singapore Airlines cancelled two Jakarta routes on Saturday and pushed two others into Sunday. Passengers were left waiting, rebooked, or stranded.
The hazard is not symbolic. Volcanic ash can destroy jet engines and strip visibility from pilots — a danger that has shaped aviation safety protocols for decades. Anak Krakatau itself rose from the sea in the 1920s, born from the caldera of the catastrophic 1883 Krakatoa eruption. In 2018, a partial collapse of its crater triggered a tsunami that killed more than 400 people. This time, disaster agencies reported no tsunami threat — but the ash was real, the airport was closed, and authorities kept watch, waiting for the sky to clear.
On Sunday morning, Indonesia's main airport ground its fleet to a halt. Soekarno-Hatta International, the sprawling hub that serves Jakarta and millions of travelers moving through Southeast Asia, suspended all flight operations until early afternoon. The reason was invisible but unmistakable: volcanic ash from Mount Anak Krakatau, erupting more than 150 kilometers away, had drifted over the capital and settled across the airport's runways and taxiways.
The volcano had begun its violent awakening late Friday, sending lava fountains skyward and producing booming sounds that carried across the ocean for 700 kilometers in every direction. By Sunday, it had erupted twice more. The Indonesian meteorological agency tracked ash columns rising to 6,000 meters on the Java side of the volcano and climbing as high as 15,000 meters on the Sumatra side and across parts of Banten province. The plume was visible, measurable, and unmistakably present at the airport itself.
Airport officials had already suspended operations once, initially planning to resume at 5:30 in the morning. But between 12:35 and 1:05 that same night, they conducted what they called a paper test—a technical assessment of conditions at the airport. The results were clear: volcanic ash was present. The suspension was extended. Lukman F Laisa, the director general of civil aviation, announced the decision with a statement about safety being the top priority in every operational choice. The airport would remain closed until 1:30 in the afternoon.
The disruption rippled through the aviation system. An earlier suspension had already affected 33 flights, including 16 international cancellations and seven delays, according to Indonesia's Ministry of Transportation. Singapore Airlines was among the carriers forced to adjust its schedule, cancelling two flights to and from Jakarta on Saturday and delaying two more into Sunday. Passengers found themselves stranded, rebooked, or simply waiting for conditions to improve.
Volcanic ash is not merely an inconvenience. It poses a genuine hazard to aircraft, capable of damaging jet engines and reducing visibility to dangerous levels. Pilots cannot see through it, and engines cannot process it. The decision to ground flights, while costly and disruptive, reflects a hard-won understanding of what happens when aircraft encounter volcanic material in the air.
Anda Krakatau itself carries the weight of history. It emerged from the sea in the 1920s, rising from the caldera left behind by the catastrophic 1883 eruption of Krakatoa—one of the deadliest volcanic events ever recorded. The volcano has erupted periodically since, including a 2018 event that partially collapsed its crater and triggered a tsunami that killed more than 400 people along the coasts of Java and Sumatra. This time, Indonesia's disaster mitigation agency reported no imminent tsunami risk. But the ash was real, the airport was closed, and authorities continued monitoring the situation with airlines, air navigation services, and the meteorological agency, waiting for conditions to clear enough to resume the flow of people and goods through one of Asia's busiest aviation hubs.
Notable Quotes
Safety remains the top priority in every operational decision, including flight schedule adjustments made by airlines.— Lukman F Laisa, Director General of Civil Aviation
Want the full story?
Read the original at Al Jazeera ↗
Weather & Disasters