Mount Ibu Erupts Again Tonight (Monday, August 4, 2025)

Mount Ibu in North Maluku erupted again on Monday (August 4, 2025) at 8:21 PM WIT. In the last week, Mount Ibu has erupted 3 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 around 500 meters above the peak (1,825 meters above sea level).

The ash column was observed to be gray with thick intensity towards the northwest. The eruption was recorded on a seismograph with a maximum amplitude of 28 millimeters and a duration of 48 seconds.

(Read: Indication of Forest and Land Fire Area in West Kalimantan Province 2016-2025)

According to the MAGMA Indonesia volcano activity report, Mount Ibu's activity level is at Level II (Alert). Seismicity observations on August 4, 2025, from 00:00-23:59 WIT showed 109 eruption/emission earthquakes with amplitudes of 16-28 millimeters and earthquake durations of 42-82 seconds.

Additionally, 8 exhalation earthquakes with amplitudes of 2-16 millimeters and durations of 32-43 seconds, and 20 harmonic tremors with amplitudes of 2-28 millimeters and durations of 32-265 seconds occurred.

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 5,455 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,188 times), while Mount Ibu erupted 2,019 times.

(Read: Nearly 5 Thousand Natural Disaster Incidents in Indonesia Throughout 2023, Forest and Land Fires Dominate)