Why This Matters

• Volcanic ash can damage jet engines, so the disruption is a precautionary measure to protect passengers and crew.
• As one of the region's busiest airports, Jakarta's closure could cause delays and cancellations for travellers across Southeast Asia.
• Indonesia's location on the Pacific Ring of Fire means further volcanic activity is always a concern for aviation.

Background

Anak Krakatau, meaning "Child of Krakatau," is a volcanic island in the Sunda Strait, formed from the caldera left by the catastrophic 1883 eruption of the original Krakatau volcano. It has been intermittently active since then, with eruptions sometimes producing large ash plumes. Volcanic ash is a known hazard for jet aircraft, as it can melt inside engines and cause them to fail. Airports typically suspend operations when ash is present on flight paths until the plume disperses or wind shifts.

Key Perspectives

Airlines and passengers: Airlines face schedule disruptions and need to reroute or cancel flights; passengers may experience delays and are advised to monitor official airline channels.

Aviation authorities: Airport operators must weigh safety risks against economic disruption, monitoring the ash plume before allowing flights to resume.

Volcanologists and monitoring agencies: Scientists track Anak Krakatau's activity to assess the likelihood of continued eruptions or larger events that could pose wider risks.

What to Watch

• Whether the ash plume remains at high altitude or disperses, which will determine when flight operations can restart.
• Any official updates from Indonesian authorities on Anak Krakatau's eruption status and the volcano's alert level.
• Potential flow-on effects on regional flight networks as airlines adjust schedules and reposition aircraft.