MAJOR ERUPTION AT ANAK KRAKATAU
Anak Krakatau is erupting in Indonesia, with satellite imagery detecting volcanic ash reaching around 48,000 ft (14.6 km).
The eruption began at 23:07 local time. Ash was moving west at around 50 knots, with the alert level at III (Siaga),… pic.twitter.com/SGL8CW0xB2
— Volcaholic 🌋 (@volcaholic1) September 4, 2026
ESTÁ PASANDO ⚠️🌋 Se registra fuerte explosión en el volcán Anak Krakatau, en el estrecho de Sonda, Indonesia 🇮🇩 pic.twitter.com/kvqdijaUjf
— Red Geocientífica de Chile (@RedGeoChile) September 4, 2026
Ash plume reaches 48,000 feet
The eruption rapidly escalated from an ash plume around 7,000 feet at 23:00 local time to roughly 45,000 feet ten minutes later, followed by an advisory placing ash near 48,000 feet.
Aviation becomes the immediate concern
The ash is moving west at roughly 50 knots, meaning the plume can spread rapidly away from the volcano. A plume reaching 48,000 feet is particularly important because it can interfere with aircraft operating at cruising altitude.