Jakarta's main airport goes dark after Anak Krakatau erupts
A brief but powerful eruption of Anak Krakatau at 3:53 a.m. on Sunday, 7 September 2026, forced the complete suspension of flight operations at Soekarno-Hatta International Airport from 5:30 a.m. to 9:30 a.m. local time. The four-hour closure affected 209 flight movements and left approximately 22,800 passengers scrambling for refunds or waiting to reclaim checked luggage as departure boards filled with cancellations.
What the volcano did
Indonesia's Geological Agency reported that the volcanic island in the Sunda Strait, sitting between Java and Sumatra, had been showing signs of increased activity since the preceding Friday. The eruption itself lasted 30 seconds, and closed-circuit cameras captured lava flares at the summit. Two separate ash clouds were subsequently identified by Indonesia's volcanology agency and the Darwin Volcanic Ash Advisory Centre in Australia using satellite imagery.
The lower plume climbed to around 6,100 metres and drifted north-east, spreading ash over parts of Jakarta, Banten, West Java and nearby waters. A second, far taller column reached 15,200 metres and moved westward and north-westward, blanketing sections of Banten, Lampung, Bengkulu and stretching into the Indian Ocean west of Sumatra. Ash also settled across Lampung province on the southern tip of Sumatra.
No casualties were reported and no evacuation order was issued. The nearest settlement sits more than 16 kilometres from the crater, though authorities advised residents and visitors to keep at least 3 kilometres clear of the active vent.
Cascading disruptions across routes
The closure rippled well beyond Jakarta. On the domestic side, services to Makassar, Bali, Surabaya and Lampung were cancelled or diverted. Internationally, Singapore recorded the highest number of disrupted flights, with further cancellations, delays and rescheduled services hitting routes to Hong Kong, Sydney, Amsterdam, Seoul, Doha and Kuala Lumpur. Indonesia's Directorate General of Civil Aviation noted that 170 aircraft parked overnight on the airport aprons remained grounded during the suspension.
Lukman F. Laisa, the Ministry of Transportation's director general of civil aviation, warned in a statement that cascading effects on aircraft rotations, fleet availability and terminal capacity could extend disruptions well beyond the initial closure window. Authorities urged all travellers to check directly with their airlines and to avoid the airport unless absolutely necessary.
A volcano with a long history
Anak Krakatau, whose name translates as "child of Krakatau," grew from the caldera left by the catastrophic 1883 eruption of its predecessor, an event that triggered a period of global cooling. In 2018, the volcano caused a tsunami that killed at least 430 people across Sumatra and Java when volcanic activity triggered an underwater landslide, collapsing a large section of the island's south-west slope into the sea. Since that disaster, the volcano has been held at the second-highest alert level on Indonesia's four-tier scale. Scientists note the island is now roughly a quarter of its former size.
Why it matters for hosts
Independent accommodation operators in Jakarta, Banten and anywhere connected to Soekarno-Hatta's flight network should build a clear volcanic-disruption protocol into their guest communications. This means maintaining an up-to-date cancellation and rebooking policy that explicitly references force-majeure events, keeping a direct-contact list of guests with imminent arrivals, and monitoring the Indonesian Centre for Volcanology and Geological Hazard Mitigation for alert-level changes. When a four-hour closure can strand nearly 23,000 passengers at once, proactive outreach to arriving guests, and flexibility on check-in windows, can meaningfully protect a property's reputation during a crisis.
The details in this post were first reported by The Sydney Morning Herald, based on reporting by Tatan Syuflana and Niniek Karmini, and sourced from AP.
First reported by smh.com.au.