Warning! Mount Semeru Erupts Again This Afternoon (Wednesday, November 26, 2025)

Mount Semeru in East Java erupted again on Wednesday (11/26/2025) at 3:28 PM Western Indonesian Time (WIB). In the past week, Mount Semeru has erupted 22 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 None meters above the peak or None meters above sea level.

Eruption visuals were not observed. The eruption of Mount Semeru was still ongoing when this report was made.

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

According to MAGMA Indonesia's volcanic activity report, Mount Semeru's activity level is at Level IV (Awas - Alert). Seismic observations on November 26, 2025, from 6:00 PM to 11:59 PM WIB showed 45 eruption/explosion earthquakes with amplitudes of 12-22 millimeters and earthquake durations of 49-142 seconds.

Furthermore, there was 1 exhalation earthquake with an amplitude of 6 millimeters and a duration of 74 seconds, and 6 distant tectonic earthquakes with amplitudes of 6-14 millimeters s-p 13-16 seconds and durations of 29-57 seconds.

PVMBG urges against any activity in the southeast sector along Besuk Kobokan, as far as 20 kilometers from the peak (eruption center). Beyond that distance, the public is advised not to engage in activities within 500 meters of the riverbanks (river borders) along Besuk Kobokan due to the potential for being affected by expanding hot clouds and lava flows.

Throughout 2025, MAGMA Indonesia has recorded 7,055 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most, with 2,834 times.

(Read: Volcanic Eruption Trends in Recent Years)