Disaster

Mount Anak Krakatau Erupts Five Times, Volcanic Ash Spreads to Banten and Lampung

Stateline MEDIA Newsroom•October 17, 2026•2 min read

Mount Anak Krakatau erupted five times early Saturday morning (17/10/2026) between 01:31 and 02:15 WIB. BMKG Lampung detected volcanic ash drifting westward to the waters off Pandeglang, Banten, and southern Lampung at an altitude of about 1.2 kilometers.

Key Facts

Mount Anak Krakatau erupted five times early Saturday morning (17/10/2026), at 01:31, 01:35, 01:40, 01:47, and 02:15 WIB.
No visual of the eruptions was observed, according to the volcano activity report.
BMKG Lampung detected volcanic ash spreading via Himawari-9 satellite imagery at 04:00 WIB, reaching an altitude of about 4,000 feet (1.2 kilometers) and drifting westward.
The ash plume covered parts of the Sunda Strait west of Pandeglang, Banten, to the southern waters of Lampung.
Adi Saputra, Forecaster On Duty at BMKG Lampung, confirmed the ash direction based on the satellite analysis.
By 07:00 WIB the ash was no longer detected by satellite — though that does not guarantee all volcanic material had settled.
Seismic readings: the 01:40 WIB eruption reached a maximum amplitude of 40 mm for 22 seconds; 01:47 WIB, 55 mm for 29 seconds; 02:15 WIB, 53 mm for 28 seconds.

Five Eruptions in 44 Minutes

Mount Anak Krakatau showed significant volcanic activity early Saturday morning (17/10/2026). Five eruptions were recorded within 44 minutes — at 01:31, 01:35, 01:40, 01:47, and 02:15 WIB. No visual of the eruptions was observed, but monitoring instruments captured them clearly on seismic readings.

The strongest instrumentally was at 01:47 WIB, with a maximum amplitude of 55 millimeters lasting 29 seconds, followed by the 02:15 WIB eruption at 53 millimeters for 28 seconds. The 01:40 WIB eruption registered a maximum amplitude of 40 millimeters over 22 seconds.

Ash Drifts West Toward Banten and Lampung

Analysis of Himawari-9 satellite imagery by BMKG Lampung detected volcanic ash at 04:00 WIB. The ash sat at an altitude of about 4,000 feet (1.2 kilometers) and drifted westward from the volcano, which lies in the Sunda Strait.

"Based on analysis of Himawari-9 satellite imagery, the volcanic ash plume was identified moving westward, covering parts of the Sunda Strait west of Pandeglang and the southern Sunda Strait off Lampung," said Adi Saputra, Forecaster On Duty at BMKG Lampung, as quoted by detikcom.

At the next observation at 07:00 WIB, the satellite no longer detected ash — though that only reflects conditions at the time of observation and does not confirm all volcanic material had settled. People active in the Sunda Strait waters are advised to follow official updates from the relevant authorities.