Mount Ibu Erupts Again Tonight (Sunday, December 21, 2025)

Mount Ibu in North Maluku erupted again on Sunday (12/21/2025) at 10:38 PM WIT. In the last week, Mount Ibu has erupted 40 times.

According to 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 about 500 meters above the peak or 1,825 meters above sea level.

The ash column was observed to be gray with thick intensity towards the northeast. The eruption was recorded on a seismograph with a maximum amplitude of 20 millimeters and a duration of 52 seconds.

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

According to the MAGMA Indonesia volcano activity report, Mount Ibu's activity level is at Level II (Alert). Seismicity observations on December 21, 2025, at 00:00-23:59 WIT showed 107 eruption tremors with amplitudes of 15-28 millimeters and durations of 42-103 seconds.

In addition, there was 1 puff tremor with an amplitude of 6 millimeters and a duration of 36 seconds, and 7 harmonic tremors with amplitudes of 3-8 millimeters and durations of 45-132 seconds.

PVMBG advises 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.

During 2025, MAGMA Indonesia has recorded 7,463 volcanic eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions (3,098 times) while Mount Ibu erupted 2,694 times.

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