Mount Lewotobi Laki-laki Erupts Again This Afternoon, Ash Height Around 1,000 Meters

Mount Lewotobi Laki-laki in East Nusa Tenggara erupted again on Monday (9/29/2025) at 16:08 WITA. In the last week, Mount Lewotobi Laki-laki has erupted 5 times.

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 was approximately 1,000 meters above the peak (2,584 meters above sea level).

The ash column was observed to be gray with thick intensity towards the southwest. The eruption was recorded on a seismograph with a maximum amplitude of 29.6 millimeters and a duration of 95 seconds.

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

According to MAGMA Indonesia's volcano activity report, Mount Lewotobi Laki-laki's activity level is at Level IV (Caution). Seismic observations on September 29, 2025, from 06:00-12:00 WITA showed 3 eruption/explosion earthquakes with amplitudes of 3.7-22.2 millimeters and durations of 75-130 seconds.

Furthermore, there were 7 exhalation earthquakes with amplitudes of 2.9-10.5 millimeters and durations of 32-50 seconds, and 2 non-harmonic tremors with amplitudes of 3.7-4.4 millimeters and durations of 93-99 seconds.

PVMBG urges the public around Mount Lewotobi Laki-laki and visitors/tourists not to carry out any activities within a 6-kilometer radius and a 7-kilometer sectoral distance from the eruption center of Mount Lewotobi Laki-laki in the Southwest-Northeast direction.

Throughout 2025, MAGMA Indonesia has recorded 6,441 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,530 times), while Mount Lewotobi Laki-laki erupted 648 times.

(Read: Indonesia Has the Most Active Volcanoes in the World)