Mount Semeru Erupts Again Tonight (Saturday, January 11, 2025)

Mount Semeru in East Java erupted again on Saturday, January 11, 2025, at 9:02 PM WIB. In the last week, Mount Semeru has erupted 81 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the ash column height was observed to be approximately 400 meters above the peak or 4,076 meters above sea level.

The ash column was observed to be white to gray with moderate intensity towards the north. The eruption of Mount Semeru was 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 11, 2025, from 00:00 to 23:59 WIB showed 56 eruption quakes with amplitudes of 10-22 millimeters and durations of 49-169 seconds.

Furthermore, there was 1 rockfall earthquake with an amplitude of 3 mm and a duration of 66 seconds, and 5 emission quakes with amplitudes of 6-8 millimeters and durations of 44-67 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, the public should not conduct 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 223 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions, with 143 eruptions.