Warning! Mount Semeru Erupts Again This Afternoon (Tuesday, March 18, 2025)

Mount Semeru in East Java erupted again on Tuesday, March 18, 2025, at 12:14 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 29 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 reach None meters above the peak or None meters above sea level.

The eruption was not visually observed. The eruption of Mount Semeru was still ongoing at the time of this report.

According to the MAGMA Indonesia volcanic activity report, the activity level of Mount Semeru is at Level II (Alert). Seismic observations on March 18, 2025, from 00:00 to 23:59 WIB showed 40 eruption quakes with amplitudes of 10-22 millimeters and durations of 55-160 seconds.

Furthermore, there were 2 rockfall quakes with amplitudes of 2-3 mm and durations of 51-75 seconds, and 16 emission quakes with amplitudes of 3-8 millimeters and durations of 35-166 seconds.

The PVMBG advises against any activity in the southeast sector along Besuk Kobokan, up to 8 kilometers from the peak (eruption center). Outside this distance, the public should not engage in activities within 500 meters of the riverbank (river edge) along Besuk Kobokan due to the potential for pyroclastic flow and lahar flows extending up to 13 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 2,275 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions with 1,039.