Jakarta, 7 September 2026 — Volcanic activity at Mount Anak Krakatau has resulted in the spread of volcanic ash across several areas of Java and Sumatra. The situation has affected flight operations and led to the temporary closure of several airports as part of mitigation measures to ensure aviation safety.
The Meteorology, Climatology, and Geophysical Agency (BMKG) continues to monitor developments related to the eruption, the spread of volcanic ash, as well as its impact on atmospheric conditions and flight operations. Based on the latest monitoring, volcanic ash has been detected in several areas, including Banten, West Java, Lampung, and Bengkulu.
The presence of volcanic ash in the airspace is an important factor to be considered in flight operations. AirNav Indonesia, together with BMKG and other aviation stakeholders, continues to monitor airspace conditions to ensure that flight operations are conducted with safety as the highest priority.
As a mitigation measure, several affected airports may be temporarily closed. Airport and flight operational status may change at any time depending on developments in the spread of volcanic ash and aviation safety assessments.
The situation may also result in delays, cancellations, schedule changes, or flight diversions. Passengers travelling to or from affected areas are therefore advised to regularly check their flight status through the official channels of their airline and airport operator.
Travel Guide: Before You Depart
If you are planning to travel to or from an affected area, take the following steps before departure:
- Check your flight status
Confirm that your flight is operating through your airline's and airport operator's official channels. - Check conditions at your destination
Monitor the latest conditions in your destination before travelling. - Check with your accommodation
Contact your hotel or accommodation provider for the latest information about conditions in the area. - Check transportation operations
Confirm that ground and maritime transportation services to and from your destination are operating. - Prepare for possible travel changes
Be prepared for delays, cancellations, schedule changes, or flight diversions, and consider alternative travel arrangements if necessary. - Do not proceed to the airport immediately
Confirm your flight status before leaving for the airport.
If You Are in an Area Affected by Volcanic Ash
Tourists and members of the public who are already in affected areas are advised to follow instructions issued by local authorities and relevant agencies.
Recommended precautions:
- Avoid outdoor activities unless necessary.
- Stay at least 5 km away from Mount Anak Krakatau and follow any additional safety boundaries established by the authorities.
- If outdoor activities are unavoidable, wear a mask or use a wet cloth to help reduce exposure to volcanic ash.
- Keep windows, doors, and ventilation openings closed to prevent volcanic ash from entering indoor spaces.
- If volcanic ash accumulates around your accommodation or property, clean it with water and avoid dry sweeping.
- Stay away from coastal and shoreline areas when advised by the relevant authorities.
- Prepare an emergency kit with essential supplies and necessary emergency items.
- Seek medical attention if you experience respiratory problems or irritation.
Monitor Flight and Transportation Operations
Volcanic ash requires particular attention in aviation because its particles can be carried through the atmosphere at certain altitudes and may pose risks to aircraft operations. Information on the location, altitude, and direction of movement of volcanic ash is therefore an important consideration in determining appropriate flight operations and safety measures.
Changing conditions may also affect flight and maritime operations. Travelers are advised to monitor the latest information before and during their journey.
Follow the instructions of the relevant authorities and prioritize safety.
Follow Official Updates
As volcanic ash conditions and transportation operations may change rapidly, travelers should use official sources as their primary reference:
- Airlines
- Airport operators
- AirNav Indonesia
- BMKG
- Center for Volcanology and Geological Hazard Mitigation (PVMBG)
- Local governments and relevant authorities
For emergencies and disaster-related assistance in Indonesia, the public can contact 117.
Travel plans do not necessarily need to be cancelled, but travelers should consider the latest conditions, prepare alternative arrangements where necessary, and adjust their plans based on instructions from the relevant authorities.
Travelers and public safety remain the top priorities. Stay calm, avoid sharing unverified information, and rely on official sources for the latest updates.
This article was updated on 7 September 2026 and will be updated as necessary in accordance with the latest developments in Mount Anak Krakatau's volcanic activity and flight and transportation operations.
Sources:
BNPB, BMKG & InJourney