Mount Ili Lewotolok Erupted on Monday Morning, Activity Level at Alert

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Monday (August 4, 2025) at 06:31 AM WITA. In the last week, Mount Ili Lewotolok 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 observed ash column reached 200 meters above the peak or 1,623 meters above sea level.

The observed ash column was gray with thick intensity towards the northeast. The eruption was recorded on a seismograph with a maximum amplitude of 2.3 millimeters and a duration of 50 seconds.

(Read: 10 Peat Hydrology Area Most Prone to Forest Fires in 2023)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Ili Lewotolok is at Level III (Alert). Seismic observations on August 4, 2025, from 00:00-06:00 AM WITA showed 19 eruption/explosion earthquakes with amplitudes of 5.8-13.9 millimeters and durations of 32-42 seconds.

Furthermore, 31 times of emission earthquakes with amplitudes of 1.4-5.1 millimeters and durations of 23-50 seconds, and 2 times of deep volcanic earthquakes with amplitudes of 1.7-4.7 millimeters s-p 0.9 seconds and durations of 15-18 seconds occurred.

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 from lava falls/landslides and pyroclastic clouds from the South, Southeast, West, and Northeast sectors of Mount Ili Lewotolok.

Throughout 2025, MAGMA Indonesia has recorded 5,448 volcanic eruptions across Indonesia. Mount Semeru in East Java erupted the most (2,186 times), while Mount Ili Lewotolok erupted 206 times.

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