Warning! Mount Ili Lewotolok Erupts Again This Afternoon (Monday, August 11, 2025)

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Monday (August 11, 2025) at 2:03 PM WITA. In the last week, Mount Ili Lewotolok has only erupted once.

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 or 1,723 meters above sea level.

The ash column was observed to be white to grey with moderate intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 25.4 millimeters and a duration of 43 seconds.

(Read: There are still 381 High-Risk Forest and Land Fire Hotspots in Indonesia in Early 2023)

According to MAGMA Indonesia's volcanic activity report, the activity level of Mount Ili Lewotolok is at Level III (Alert). Seismicity observations on August 11, 2025, from 06:00-12:00 WITA showed 40 eruption earthquakes with amplitudes of 11.4-32.5 millimeters and earthquake durations of 36-56 seconds.

Furthermore, there were 51 exhalation earthquakes with amplitudes of 1.6-15.8 millimeters and durations of 26-44 seconds, as well as 7 non-harmonic tremors with amplitudes of 1.9-7.6 millimeters and durations of 77-165 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 danger from lava falls/landslides and pyroclastic clouds from the Southern and Southeastern sectors, Western sector, and Northeastern sector of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 5,560 volcanic eruptions across Indonesia. Mount Semeru in East Java erupted the most (2,221 times), while Mount Ili Lewotolok erupted 227 times.

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