Warning! Mount Semeru Erupts Again This Afternoon (Friday, August 8, 2025)

Mount Semeru in East Java erupted again on Friday (8/8/2025) at 3:49 PM WIB. In the last week, Mount Semeru has erupted 22 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 observed reached None meters above the peak (None meters above sea level).

The visual eruption was not observed. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 104 seconds.

(Read: These are the 10 Largest Earthquakes in History, Two of them from Indonesia)

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on August 8, 2025, from 00:00-23:59 WIB showed 25 eruption/explosion earthquakes with amplitudes of 15-22 millimeters and durations of 57-167 seconds.

Then, 1 rockfall earthquake with an amplitude of 2 mm and a duration of 52 seconds, and 4 emission earthquakes with amplitudes of 4-8 millimeters and durations of 34-50 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Beyond that distance, the public is advised not to conduct activities within 500 meters from the riverbanks along Besuk Kobokan due to the potential for being affected by the expansion of pyroclastic clouds and lahar flows up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 5,514 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions with 2,207 times.

(Read: A 4.4 M Earthquake Shakes Babar, Indonesia)