Mount Semeru Erupts Again Today, Ash Plume Reaches 2,000 Meters

Mount Semeru in East Java erupted again on Wednesday (19/11/2025) at 4:00 PM WIB. In the last week, Mount Semeru has erupted 12 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 was approximately 2,000 meters above the peak (5,676 meters above sea level).

The ash column was observed to be gray with thick intensity towards the north and northwest. Mount Semeru's eruption was still ongoing when this report was made.

(Read: 4.4 M Earthquake Shakes Babar, Indonesia)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level II (Alert). Seismic observations on November 19, 2025, from 00:00-23:59 WIB showed 156 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and a duration of 45-180 seconds.

Subsequently, there were 26 avalanche earthquakes with amplitudes of 2-5 mm and a duration of 36-130 seconds, and 9 emission earthquakes with amplitudes of 2-8 millimeters and a duration of 39-67 seconds.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Outside this distance, the public should not carry out activities within 500 meters from the riverbanks (river borders) along Besuk Kobokan, as there is a potential for expansion of hot clouds and lava flows up to 13 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 6,993 volcanic eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions with 2,806 times.

(Read: 4.8 M Earthquake Shakes 219 Km East of Levuka,)