Mount Semeru Erupts Again This Evening (Friday, April 18, 2025)

Mount Semeru in East Java erupted again on Friday, April 18, 2025, at 5:46 PM WIB. In the last week, Mount Semeru has erupted 66 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 visual eruption was not observed. The eruption was recorded on the seismograph with a maximum amplitude of 20 millimeters and a duration of 74 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Observations of seismic activity on April 18, 2025, from 00.00 to 23.59 WIB showed 64 eruption quakes with amplitudes of 10-23 millimeters and durations of 68-257 seconds.

Furthermore, there were 3 rockfall quakes with amplitudes of 2-14 mm and durations of 84-120 seconds, and 6 emission quakes with amplitudes of 3-7 millimeters and durations of 40-86 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 2,948 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions with 1,339.