Mount Ili Lewotolok Erupts Again This Afternoon, Volcanic Ash 400 Meters Above Peak

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Tuesday (September 16, 2025) at 17.05 WITA. In the last week, Mount Ili Lewotolok has erupted 5 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the ash column was observed to be around 400 meters above the peak (1,823 meters above sea level).

The ash column was observed to be gray with thick intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 7.9 millimeters and a duration of 53 seconds.

(Read: Hotspots of Forest and Land Fires in South Sumatra Increased in Mid-October 2023)

According to MAGMA Indonesia''s volcano activity report, Mount Ili Lewotolok''s activity level is at Level III (Alert). Seismicity observations on September 16, 2025, at 06.00-12.00 WITA showed 51 eruption earthquakes with amplitudes of 7.3-24.9 millimeters and durations of 32-60 seconds.

Then, 1 rockfall earthquake with an amplitude of 1.9 mm and a duration of 42 seconds, and 52 exhalation earthquakes with amplitudes of 3-4 millimeters and durations of 25-52 seconds.

PVMBG urges the public around Mount Ili Lewotolok, as well as visitors/hikers/tourists, not to enter or conduct activities within a 3-kilometer radius from the center of Mount Ili Lewotolok''s activity, and to be aware of the potential danger of lava avalanches/landslides and pyroclastic flows from the Southern, Southeastern, Western, and Northeastern sectors of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 6,122 volcanic eruptions across Indonesia. Mount Semeru in East Java erupted the most (2,454 times) while Mount Ili Lewotolok erupted 273 times.

(Read: NTT Always Hit by Forest and Land Fires in the Last 10 Years, BMKG Urges Increased Preparedness)