Anak Krakatau Volcanic Ash Moves Southwest: Satellite Imagery Revealed

The agency reported that the drifting ash continues to reduce air quality and visibility while posing specific hazards to aircraft at designated flight altitudes. BMKG has not yet provided an estimate on when the volcanic ash dispersion will begin to decrease, noting that the material is spreading further away from the volcano’s peak across multiple atmospheric layers.

Atmospheric Layers and Dispersion Patterns

According to BMKG observations, the volcanic ash has been detected moving away from the peak of Mount Anak Krakatau across two distinct height layers with separate dispersion vectors. The first is a low layer spanning from the surface up to 15,000 ft/4,57 km, which moves toward the southwest and northwest. This low-altitude spread encompasses parts of Banten, West Java, Lampung, Bengkulu, and the Indian Ocean west of Bengkulu and Lampung, carrying the potential to degrade local air quality and visibility.

The second tier is a high layer reaching from the surface -50,000 ft/15,24 km, tracking toward the southwest and west. This upper-level dispersion covers the Indian Ocean west and southwest of Bengkulu, Lampung, and Banten. Because it occupies elevations utilized by commercial and transit aircraft, this high-altitude cloud presents a direct concern for aviation paths.

Potential Implications for Aviation and Regional Air Quality

The persistence of volcanic debris at varying altitudes creates distinct operational challenges for both ground-level populations and transit networks. Low-altitude ash concentrations directly threaten regional visibility and respiratory conditions in affected provinces, whereas upper-atmosphere plumes intersect with active flight corridors. Agencies continue to track these trajectories as the eruption column feeds material into changing wind patterns.

Frequently Asked Questions

Which direction is the volcanic ash from Mount Anak Krakatau moving?

According to BMKG, the volcanic ash is moving toward the southwest and is detected across two distinct height layers with varying trajectories.

What altitudes are currently affected by the ash dispersion?

BMKG has identified two layers: a low layer ranging from the surface to 15,000 ft/4,57 km and a high layer spanning from the surface -50,000 ft/15,24 km.

What services and sectors are being disrupted by the activity?