Krakatoa Ash Spreads to Jakarta, Banten, and West Java: Check BMKG Warnings

Volcanic activity from Mount Anak Krakatau has triggered the dispersal of ash material moving in various directions, covering a significant area.

Based on reports from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG), the Volcanic Ash Advisory Center (VAAC) Darwin, and analysis of Himawari-9 RGB imagery, as cited from BMKG’s social media on Sunday (6/9/202_ [Note: Source date 2026], two main clusters of volcanic ash distribution have been observed in the atmosphere:

• Lower Layer (Up to 20,000 ft): The volcanic ash distribution was observed moving towards the east-south, covering parts of DKI Jakarta, Banten, West Java, and the surrounding waters.

• Upper Layer (Up to 50,000 ft): The ash distribution was observed stretching towards the southwest-northwest, covering parts of Banten, Lampung, Bengkulu, the southern waters of the Sunda Strait, up to the Indian Ocean region west of Bengkulu, Lampung, and Banten.

Meanwhile, from a climatological perspective, the weather forecast around the Mount Anak Krakatau area for the period of 6-8 September 2026 is generally predicted to be sunny to cloudy. Wind movement is dominated by directions from the east to the southeast, with speeds ranging between 31-37 km per hour.

In facing these conditions, relevant authorities urge the public and transport sector operators active in the affected areas to continuously increase vigilance and proactively monitor official information updates from the BMKG and other authorised agencies.