Mount Ili Lewotolok Erupts Again This Afternoon, Volcanic Ash Plume Approximately 300 Meters High

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Saturday (6/9/2025) at 17:18 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 300 meters above the peak (1,723 meters above sea level).

The ash column was observed to be gray with moderate to thick intensity towards the northwest. The eruption was recorded on a seismograph with a maximum amplitude of 32.3 millimeters and a duration of 47 seconds.

(Read: Air Quality in Major Indonesian Cities is Poor, Far Below WHO Standards)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Ili Lewotolok is at Level III (Alert). Seismic observations on September 6, 2025, from 12:00-18:00 WITA showed 22 eruption/explosion earthquakes with amplitudes of 12.4-32.3 millimeters and durations of 31-47 seconds.

Furthermore, there were 68 exhalation earthquakes with amplitudes of 1.6-19.3 millimeters and durations of 28-40 seconds, and 2 deep volcanic earthquakes with amplitudes of 6.8-27.8 millimeters s-p 0.6-0.7 seconds and durations of 9-11 seconds.

PVMBG urges the public around Mount Ili Lewotolok, as well as visitors/climbers/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 hazards from lava avalanches/landslides and pyroclastic clouds from the South and Southeast sectors, West sector, and Northeast sector of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 5,986 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,397 times), while Mount Ili Lewotolok erupted 257 times.

(Read: Warning, Jakarta''s Air Quality This Morning is the World''s Worst (Thursday, June 15, 2023))