Mount Semeru Erupts Again This Afternoon (Saturday, November 29, 2025)

Mount Semeru in East Java erupted again on Saturday (29/11/2025) at 17:54 WIB. In the last week, Mount Semeru has erupted 61 times.

According to eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached None meters above the peak (None meters above sea level).

The eruption visuals were not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 117 seconds.

(Read: After Surging, Number of Natural Disasters in Indonesia Decreased in 2024)

According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level III (Alert). Seismic observations on November 29, 2025, from 06:00-12:00 WIB showed 41 eruption earthquakes with amplitudes of 10-22 millimeters and earthquake durations of 53-135 seconds.

Subsequently, there was 1 exhalation earthquake with an amplitude of 6 millimeters and a duration of 106 seconds, and 1 distant tectonic earthquake with an amplitude of 20 millimeters s-p 18 seconds and a duration of 54 seconds.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, as far as 20 kilometers from the peak (eruption center). Beyond this distance, the public should not engage in activities within 500 meters from the riverbanks (river boundaries) along Besuk Kobokan due to the potential for expansion of hot clouds and lava flows.

Throughout 2025, MAGMA Indonesia has recorded 7,108 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,873 occurrences.

(Read: There Were 1,300 Natural Disasters in Indonesia Until September 2024, Here are the Details)