Mount Semeru Erupts Again Tonight (Tuesday, November 25, 2025)

Mount Semeru in East Java erupted again on Tuesday (25/11/2025) at 00:20 AM WIB. In the last week, Mount Semeru has erupted 8 times.

Based on 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 700 meters above the peak or 4,376 meters above sea level.

The ash column was observed to be white to grey with moderate intensity towards the north. Mount Semeru's eruption was still ongoing when this report was made.

(Read: Number of Earthquake Disaster Victims in Indonesia in 2020-2024)

According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level IV (Alert). Seismicity observations on November 25, 2025, at 18:00-23:59 WIB showed 45 eruption quakes with amplitudes of 10-22 millimeters and durations of 64-162 seconds.

Subsequently, there were 2 avalanche quakes with amplitudes of 3-10 mm and durations of 29-107 seconds, and 4 emission quakes with amplitudes of 6-8 millimeters and durations of 43-45 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, as far as 20 kilometers from the peak (eruption center). Beyond that distance, people should not engage in activities within 500 meters of the river banks (river boundaries) along Besuk Kobokan due to the potential for hot cloud expansion and lava flows.

Throughout 2025, MAGMA Indonesia has recorded 7,033 volcano eruptions across Indonesia. Mount Semeru in East Java had the most eruptions with 2,820 occurrences.

(Read: 4.4 M Earthquake Shakes Babar, Indonesia)