Warning! Mount Semeru Erupts Again This Afternoon (Thursday, February 20, 2025)

Mount Semeru in East Java erupted again on Thursday, February 20, 2025, at 11:31 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 67 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 (None meters above sea level).

The visual eruption was not observed. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 115 seconds.

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level II (Alert). Observations of seismic activity on February 20, 2025, from 00:00 to 23:59 WIB, showed 51 eruption quakes with amplitudes of 10-24 millimeters and durations of 49-158 seconds.

Then, there were 3 rockfall quakes with amplitudes of 5-8 mm and durations of 53-98 seconds, and 7 emission quakes with amplitudes of 4-7 millimeters and durations of 30-75 seconds.

The PVMBG advises against any activity in the southeast sector along Besuk Kobokan, up to 13 kilometers from the peak (eruption center). Outside this distance, people should not carry out activities within 500 meters of the riverbank (river buffer zone) along Besuk Kobokan due to the potential for pyroclastic flow and lava flows extending up to 17 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 1,421 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions, with 705 eruptions.