Warning! Mount Semeru Erupts Again This Afternoon (Tuesday, January 21, 2025)

Mount Semeru in East Java erupted again on Tuesday, January 21, 2025, at 2 PM WIB. In the last week, Mount Semeru has erupted 57 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 eruption was not visually observed. The eruption of Mount Semeru is still ongoing at the time of this report.

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level II (Alert). Seismic observations on January 21, 2025, from 00.00 to 23.59 WIB showed 69 eruption quakes with amplitudes of 12-23 millimeters and durations of 68-210 seconds.

Furthermore, there were 13 puffing quakes with amplitudes of 4-8 millimeters and durations of 48-96 seconds, and 7 harmonic tremors with amplitudes of 2-9 millimeters and durations of 79-269 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 569 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions, with 300 eruptions.