Mount Ili Lewotolok Erupts Again This Afternoon, Eruption Height 500 Meters Above Peak

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Monday (22/9/2025) at 11:15 AM WITA. In the last week, Mount Ili Lewotolok has erupted 2 times.

Citing eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the observed ash column reached 500 meters above the peak or 1,923 meters above sea level.

The observed ash column was white to gray with moderate intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 16.6 millimeters and a duration of 59 seconds.

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

According to MAGMA Indonesia''s volcanic activity report, the activity level of Mount Ili Lewotolok is at Level III (Alert). Seismic observations on September 22, 2025, from 06:00-12:00 WITA showed 68 eruption earthquakes with amplitudes of 8.1-37.1 millimeters and durations of 34-78 seconds.

Subsequently, there were 55 exhalation earthquakes with amplitudes of 1.9-9.1 millimeters and durations of 26-60 seconds, and 3 non-harmonic tremors with amplitudes of 1.7-2.7 millimeters and durations of 115-134 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 dangers from lava falls/landslides and pyroclastic clouds from the South and Southeast sectors, the West sector, and the Northeast sector of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 6,263 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,472 times) while Mount Ili Lewotolok erupted 279 times.

(Read: Volcanic Eruption Trends in Recent Years)