BALINEWSID.COM, TANGERANG — The spread of volcanic ash from Mount Anak Krakatau has disrupted air operations, with six airports remaining closed as of Monday, September 7, 2026, according to the latest aeronautical information issued by AirNav Indonesia.

The temporary closures were based on updated Notices to Airmen (NOTAMs) and were implemented as a safety mitigation measure amid the expanding distribution of volcanic ash.

According to AirNav Indonesia, monitoring by the Meteorology, Climatology and Geophysical Agency (BMKG) showed that the volcanic ash had spread across parts of Banten, Jakarta, West Java, Lampung and Bengkulu.

Mount Anak Krakatau’s volcanic activity also remains at Level III, or Alert, prompting continued monitoring of airspace conditions.

The six airports listed as closed in the latest NOTAM are:

1. Soekarno-Hatta International Airport (CGK) — closed from 11:20 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

2. Halim Perdanakusuma Airport (HLP) — closed from 11:26 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

3. Radin Inten II Airport, Lampung (TKG) — closed from 11:23 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

4. Husein Sastranegara Airport, Bandung (BDO)** — closed from 11:31 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

5. Budiarto Airport, Curug (RTO) — closed from 11:29 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

6. Pondok Cabe Airport (PCB) — closed from 11:36 p.m. on September 6 until an estimated 8:59 a.m. on September 7.

AirNav Indonesia said the closures were necessary to mitigate risks to aviation safety, particularly in response to the presence and movement of volcanic ash in the airspace surrounding the affected airports.

Volcanic ash poses a significant hazard to aircraft operations and can affect aircraft engines and other critical systems. Authorities therefore continue to assess airspace conditions before determining whether airport operations can safely resume.

AirNav Indonesia said it is continuously monitoring the distribution of volcanic ash and developments in Mount Anak Krakatau’s volcanic activity.

The company also continues to coordinate with aviation stakeholders to ensure that information on airspace conditions and air navigation services is delivered promptly and accurately.

AirNav Indonesia said further aeronautical information, including updates on airport operational status, will be issued based on the latest conditions and aviation safety considerations.

The update was issued by AirNav Indonesia Executive Vice President of Corporate Secretary Hermana Soegijantoro on September 7, 2026.