Mount Ibu Erupts Again This Afternoon (Thursday, December 4, 2025)

Mount Ibu in North Maluku erupted again on Thursday (4/12/2025) at 11:40 AM WIT. In the last week, Mount Ibu has erupted 12 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 600 meters above the peak or 1,925 meters above sea level.

The observed ash column was gray with thick intensity towards the north, northeast, and east. The eruption was recorded on a seismograph with a maximum amplitude of 28 millimeters and a duration of 41 seconds.

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According to the MAGMA Indonesia volcanic activity report, Mount Ibu's activity level is at Level II (Alert). Seismicity observations on December 4, 2025, from 00:00-23:59 WIT showed 106 eruption tremors with amplitudes of 17-28 millimeters and tremor durations of 37-81 seconds.

Furthermore, there was 1 puffing tremor with an amplitude of 10 millimeters and a duration of 37 seconds, and 5 harmonic tremors with amplitudes of 4-28 millimeters and durations of 61-111 seconds.

PVMBG urges the public around Mount Ibu and visitors/tourists not to engage in activities within a 2-kilometer radius and a sectoral expansion of 3.5 kilometers towards the crater opening in the northern part of Mount Ibu's active crater.

Throughout 2025, MAGMA Indonesia has recorded 7,191 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,936 times), while Mount Ibu erupted 2,590 times.

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