Mount Semeru Erupts Again This Morning (Saturday, August 2, 2025)

Mount Semeru in East Java erupted again on Saturday (August 2, 2025) at 05:52 AM Western Indonesian Time (WIB). In the last week, Mount Semeru has erupted 31 times.

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

The visual eruption was not observed. The eruption of Mount Semeru was still ongoing when this report was made.

(Read: Floods Still the Most Frequent Disaster in Indonesia Until March 2025 )

According to the MAGMA Indonesia volcanic activity report, Mount Semeru's activity level is at Level II (Alert). Seismicity observations on August 2, 2025, from 00:00-23:59 WIB, showed 51 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and earthquake durations of 50-188 seconds.

Additionally, there were 4 rockfall earthquakes with amplitudes of 3-8 mm and durations of 32-135 seconds, and 11 gas emission earthquakes with amplitudes of 4-8 millimeters and durations of 22-87 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Beyond this distance, people should not engage in activities within 500 meters from the riverbanks along Besuk Kobokan due to the potential for expansion of hot clouds and lava flows up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 5,420 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,176 occurrences.

(Read: BPBD: West Sumatra Flood Disaster Losses Reach IDR 108.38 Billion)