Warning! Mount Semeru Erupts Again This Afternoon (Saturday, January 4, 2025)

Mount Semeru in East Java erupted again on Saturday, January 4, 2025, at 4:55 PM WIB. In the last week, Mount Semeru has erupted 86 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 a seismograph with a maximum amplitude of 22 millimeters and a duration of 137 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Observations of seismic activity on January 4, 2025, from 00.00 to 23.59 WIB showed 46 eruption quakes with amplitudes of 10-22 millimeters and durations of 50-168 seconds.

Then, there were 10 puffing quakes with amplitudes of 3-8 millimeters and durations of 33-63 seconds, and 2 harmonic quakes with amplitudes of 6-8 millimeters and durations of 104-260 seconds.

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 engage in 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 86 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions, with 55 eruptions.