Mount Semeru Erupts Again Tonight (Monday, February 17, 2025)

Mount Semeru in East Java erupted again on Monday, February 17, 2025, at 11:52 PM WIB. In the last week, Mount Semeru has erupted 37 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 600 meters above the peak or 4,276 meters above sea level.

The ash column was observed to be white to gray with moderate intensity towards the southwest. 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 February 17, 2025, from 00:00 to 23:59 WIB showed 44 eruption quakes with amplitudes of 13-23 millimeters and durations of 60-160 seconds.

Furthermore, there were 11 puffing quakes with amplitudes of 3-8 millimeters and durations of 32-118 seconds, and 1 harmonic tremor with an amplitude of 7 millimeters and a duration of 84 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 1,353 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions, with 675 eruptions.