Mount Semeru Erupts Again This Morning (Wednesday, January 29, 2025)

Mount Semeru in East Java erupted again on Wednesday, January 29, 2025, at 05:37 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 50 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 700 meters above the peak or 4,376 meters above sea level.

The ash column was observed to be gray with thick intensity towards the north and northeast. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 119 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 29, 2025, from 00:00 to 23:59 WIB, showed 55 eruption quakes with amplitudes of 13-23 millimeters and durations of 45-189 seconds.

Furthermore, there were 6 puffing quakes with amplitudes of 3-8 millimeters and durations of 53-74 seconds, and 1 deep volcanic quake with an amplitude of 11 millimeters, an S-P time of 1.48 seconds, and a duration of 22 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, the public should not engage in activities within 500 meters of the riverbank (river buffer zone) along Besuk Kobokan due to the potential for the expansion of pyroclastic flows and lahars up to 17 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 841 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java had the most eruptions, with 404 eruptions.