Mount Semeru Erupts Again in the Early Hours of Today (Monday, March 17, 2025)

Mount Semeru in East Java erupted again on Monday, March 17, 2025, at 02:38 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 16 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 reach 500 meters above the peak (4,176 meters above sea level).

The ash column was observed to be white to gray with thick intensity towards the south. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 130 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on March 17, 2025, from 00:00 to 23:59 WIB, showed 52 eruption quakes with amplitudes of 10-22 millimeters and durations of 51-190 seconds.

Furthermore, there were 3 rockfall quakes with amplitudes of 2-3 mm and durations of 41-54 seconds, and 19 emission quakes with amplitudes of 3-8 millimeters and durations of 38-88 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 conduct 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 2,239 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions, with 1,026.