Warning! Mount Semeru Erupts Again This Morning (Thursday, July 31, 2025)

Mount Semeru in East Java erupted again on Thursday (July 31, 2025) at 08:04 AM WIB. In the past week, Mount Semeru has erupted 20 times.

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

The eruption's visuals were not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 125 seconds.

(Read: There were 137 Natural Disaster Incidents Towards the End of January 2024, Floods Most Frequent)

According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on July 31, 2025, from 00:00-23:59 WIB showed 40 eruption earthquakes with amplitudes of 10-22 millimeters and durations of 41-175 seconds.

Furthermore, 2 rockfall earthquakes with amplitudes of 5-6 mm and durations of 36-57 seconds, as well as 5 emission earthquakes with amplitudes of 3-6 millimeters and durations of 34-148 seconds.

PVMBG urges against any activity in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Beyond that distance, the public should not engage in activities within 500 meters from the riverbanks (river borders) along Besuk Kobokan due to the potential for being affected by the expansion of hot clouds and lava flows up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 5,394 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,165 times.

(Read: Floods Dominate Natural Disasters in Indonesia End of February 2024)