Mount Ibu Erupts Again This Afternoon, Volcanic Ash Plume 400 Meters from the Peak

Mount Ibu in North Maluku erupted again on Monday (September 15, 2025) at 3:58 PM WIT. In the last week, Mount Ibu has erupted 4 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 reached 400 meters above the peak or 1,725 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 28 millimeters and a duration of 58 seconds.

(Read: Jakarta''s Air Quality This Morning is the Second Worst in the World (Friday, June 17, 2022))

According to the MAGMA Indonesia volcano activity report, Mount Ibu''s activity level is at Level II (Alert). Seismicity observations on September 15, 2025, from 00:00 to 23:59 WIT showed 120 eruption/explosion earthquakes with amplitudes of 14-28 millimeters and durations of 33-67 seconds.

Furthermore, there were 3 gaseous emission earthquakes with amplitudes of 3-8 millimeters and durations of 38-59 seconds, and 22 harmonic earthquakes with amplitudes of 2-15 millimeters and durations of 24-298 seconds.

PVMBG urged 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 6,109 volcanic eruptions/explosions across Indonesia. Mount Semeru in East Java had the most eruptions (2,450 times), while Mount Ibu erupted 2,244 times.

(Read: Air Quality in Indonesia Slightly Improved in 2021)