Mount Semeru Erupts Again in the Early Hours of Today, Volcanic Ash Reaches Approximately 600 Meters

Mount Semeru in East Java erupted again on Thursday, February 27, 2025, at 04:19 WIB (Western Indonesian Time). In the last week, Mount Semeru has erupted 83 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 reach 600 meters above the peak or 4,276 meters above sea level.

The ash column was observed to be white to gray with thick intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 118 seconds.

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Observations of seismic activity on February 27, 2025, from 00:00 to 23:59 WIB, showed 58 eruption quakes with amplitudes of 12-23 millimeters and durations of 63-189 seconds.

Furthermore, there were 3 rockfall quakes with amplitudes of 2-5 mm and durations of 56-66 seconds, and 13 emission quakes with amplitudes of 2-8 millimeters and durations of 32-96 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, 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 13 kilometers from the peak.

During 2025, MAGMA Indonesia has recorded 1,676 volcanic eruptions/eruptions throughout Indonesia. Mount Semeru in East Java has experienced the most eruptions, with 797 recorded events.