Mount Semeru Erupts Again Tonight, Eruption Height Approximately 900 Meters

Mount Semeru in East Java erupted again on Saturday, March 15, 2025, at 7:27 PM WIB. In the last week, Mount Semeru has erupted 73 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the ash column height was observed to be approximately 900 meters above the peak (4,576 meters above sea level).

The ash column was observed to be gray with thick intensity towards the northwest. The eruption was recorded on a seismograph with a maximum amplitude of 23 millimeters and a duration of 133 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 15, 2025, from 00:00 to 23:59 WIB showed 49 eruption quakes with amplitudes of 10-22 millimeters and durations of 60-228 seconds.

Then, there were 2 pyroclastic flow quakes with amplitudes of 4-6 mm and durations of 49-65 seconds, and 7 tremor quakes with amplitudes of 3-8 millimeters and durations of 30-87 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 expansion and lava flows up to 13 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 2,201 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions with 1,014 eruptions.