Mount Ibu Erupts Again Tonight (Thursday, September 4, 2025)

Mount Ibu in North Maluku erupted again on Thursday (September 4, 2025) at 18:53 WIT. In the last week, Mount Ibu has erupted 20 times.

Reporting 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 600 meters above the peak (1,925 meters above sea level).

The ash column was observed to be gray with thick intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 4 millimeters and a duration of 37.25 seconds.

(Read: Due to Forest Fires, ISPA Cases in South Kalimantan Reached 189 Thousand as of September 2023)

According to MAGMA Indonesia''s volcano activity report, Mount Ibu''s activity level is at Level II (Alert). Seismicity observations on September 4, 2025, from 00:00-23:59 WIT showed 114 eruption/explosive earthquakes with amplitudes of 16-28 millimeters and earthquake durations of 36-78 seconds.

Then, 3 times of emission earthquakes with amplitudes of 6-10 millimeters and earthquake durations of 34-50 seconds, and 15 times of harmonic earthquakes with amplitudes of 2-28 millimeters and earthquake durations of 33-129 seconds.

PVMBG urges the public around Mount Ibu and visitors/tourists not to engage in activities within a radius of 2 kilometers 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 5,959 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions (2,385 times), while Mount Ibu erupted 2,184 times.

(Read: Forest Fire Hotspots in South Sumatra Increased in Mid-October 2023)