Volcanic Ash From the Sunda Strait Reaches the Capital
Mount Anak Krakatau erupted again on the morning of September 6, 2026, sending a plume of volcanic ash across a wide arc that stretched from Banten through parts of Central Java and into the Jakarta metropolitan area. The Jakarta Provincial Government moved quickly to reassure the public while issuing concrete guidance on how to stay safe.
Chico Hakim, Special Staff to the Governor of Jakarta, urged residents to stay calm and to rely only on information from verified official sources, specifically the meteorological agency BMKG, the volcanology center PVMBG, the national disaster management body BPBD, and the Provincial Government itself. Misinformation circulating on social media was a particular concern, and officials asked the public not to share or act on unverified reports.
What the Data Shows
According to the Geological Agency under the Ministry of Energy and Mineral Resources, the eruption was recorded at 07:10 Western Indonesian Time, with a seismograph amplitude of 50 mm lasting 16 seconds. A subsequent BMKG reading at 09:03 WIB captured a second episode with an amplitude of 19 mm over roughly 29 seconds. Importantly, BMKG reported no significant anomalies in sea-level readings at the time, and no unusual seismic signals were detected in surrounding areas.
The volcano remains at Level III, known locally as Siaga or Alert, the second-highest status on Indonesia's four-tier scale. The primary hazard near the crater is lava flow that may be accompanied by ejected incandescent rocks. A strict exclusion zone of 3 kilometers around the activity center is in effect for both the general public and tourists.
Health and Safety Advice for Anyone in the Ash Zone
The Jakarta Provincial Government issued a clear set of precautions for anyone in areas receiving ashfall:
- Wear a mask when going outside.
- Reduce outdoor activities unless they are urgent.
- Keep doors, windows, and ventilation points closed to stop ash from entering indoor spaces.
- Wear protective eyewear; if ash contacts the eyes, rinse with clean water rather than rubbing.
- Cover food and beverages.
- Clean up ash using wet methods, not dry sweeping, to avoid resuspending fine particles.
- Drive carefully, as ash reduces visibility and makes road surfaces slippery.
- Seek medical attention immediately for shortness of breath, severe eye irritation, or other respiratory symptoms.
The ash dispersion zone was observed to be expanding eastward as far as Purbalingga Regency in Central Java, and wind conditions at different atmospheric altitudes may continue to shift its direction.
Why It Matters for Hosts
Independent accommodation operators in Jakarta and across the affected corridor should act on the official guidance directly. Providing guests with masks on arrival, sealing air gaps around windows and doors, and placing a brief printed note in rooms summarizing the health precautions will reduce guest anxiety and potential liability. Hosts should also monitor BMKG and BPBD updates in real time and be prepared to help guests rebook or reroute if flight cancellations, which have already affected Soekarno-Hatta Airport according to related reporting, extend their stays unexpectedly. Clear, calm communication grounded in official sources is the most valuable thing a host can offer during a fast-moving volcanic event.
The details in this post were first reported by Tempo.co, citing statements from Chico Hakim of the Jakarta Provincial Government and data from the Geological Agency and BMKG, published September 6, 2026. This post is published by the Qontaktly travel blog.
First reported by en.tempo.co.