Mount Ili Lewotolok Erupts on Monday Afternoon, Activity Level at Alert Status

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Monday (August 18, 2025) at 4:56 PM WITA. In the last week, Mount Ili Lewotolok has erupted 3 times.

According to 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 700 meters above the peak or 2,123 meters above sea level.

The ash column was observed to be white to grey with thick intensity towards the southwest. The eruption was recorded on a seismograph with a maximum amplitude of 3.1 millimeters and a duration of 62 seconds.

(Read: Volcanic Eruption Trends in Recent Years)

According to MAGMA Indonesia's volcanic activity report, Mount Ili Lewotolok's activity level is at Level III (Alert). Seismicity observations on August 18, 2025, from 06:00-12:00 WITA showed 22 eruption tremors with amplitudes of 5-13.2 millimeters and durations of 46-56 seconds. Additionally, there were 20 exhalation tremors with amplitudes of 1.3-2.1 millimeters and durations of 23-52 seconds.

PVMBG urges the public around Mount Ili Lewotolok as well as visitors/climbers/tourists not to enter and not to carry out activities within a 3-kilometer radius from the center of Mount Ili Lewotolok's activity, and to be aware of the potential danger from falling/sliding lava and pyroclastic flows from the South and Southeast sectors, West sector, and Northeast sector of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 5,679 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most (2,276 times), while Mount Ili Lewotolok has erupted 239 times.

(Read: Countries with the Most Active Volcanoes in the World, Indonesia Ranks First)