Anak Krakatau raised to Level III alert after July eruption

Indonesia’s Geological Agency elevated the alert status of the Anak Krakatau volcano to Level III (the second‑highest tier) on 2–3 July 2026 following a marked surge in volcanic activity. Monitoring instruments recorded a sharp increase in shallow volcanic earthquakes, hybrid tremors and continuous tremor events, as well as inflation signals from tiltmeter stations and heightened SO₂ emissions.

On 2 July the volcano erupted, sending an ash column about 200 metres above the summit (approximately 357 metres above sea level). The eruption was captured on seismographs with a maximum amplitude of 23 mm lasting roughly 20 seconds, and produced a thick gray‑black ash plume drifting northwest. In response, authorities established a hazard exclusion zone of three kilometres (some reports cite a five‑kilometre radius) around the active crater, prohibiting residents, fishermen, tourists and climbers from approaching the area. Local officials urged the public to remain calm, follow official information from the PVMBG and avoid unverified rumors, while continuing normal daily activities under the guidance of regional disaster‑management agencies.