Warning! Mount Ili Lewotolok Erupts Again This Afternoon (Thursday, September 25, 2025)

Mount Ili Lewotolok in East Nusa Tenggara erupted again on Thursday (September 25, 2025) at 16:39 WITA. In the last week, Mount Ili Lewotolok has erupted 5 times.

Citing 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 500 meters above the peak (1,923 meters above sea level).

The ash column was observed to be grey with thick intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 11.8 millimeters and a duration of 34 seconds.

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According to the MAGMA Indonesia volcano activity report, the activity level of Mount Ili Lewotolok is at Level III (Alert). Seismicity observations on September 25, 2025, from 06:00-12:00 WITA showed 71 eruptive earthquakes with an amplitude of 8-33.7 millimeters and a duration of 48-88 seconds.

Then, 50 exhalation tremors with an amplitude of 1.7-7.7 millimeters and a duration of 29-60 seconds, and 1 harmonic tremor with an amplitude of 3.5 millimeters and a duration of 169 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 potential hazards from lava falls/landslides and pyroclastic clouds from the South and Southeast sectors, the West sector, and the Northeast sector of Mount Ili Lewotolok.

During 2025, MAGMA Indonesia has recorded 6,327 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,488 times), while Mount Ili Lewotolok erupted 282 times.

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