Mount Semeru Erupts Again in the Early Hours of Today (Tuesday, March 4, 2025)

Mount Semeru in East Java erupted again on Tuesday, March 4, 2025, at 01:18 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 35 times.

According to 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 (None meters above sea level).

The eruption was not visually observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 121 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Observations of seismic activity on March 4, 2025, from 00:00 to 23:59 WIB, showed 59 eruption quakes with amplitudes of 10-22 millimeters and durations of 60-176 seconds.

Furthermore, there were 3 puffing quakes with amplitudes of 4-8 millimeters and durations of 62-83 seconds, and 5 harmonic tremors with amplitudes of 2-8 millimeters and durations of 102-286 seconds.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, up to 8 kilometers from the peak (eruption center). Outside this distance, people should not engage in activities within 500 meters of the riverbank (river buffer zone) 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 1,854 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions, with 868.