Warning! Mount Semeru Erupts Again This Afternoon (Tuesday, August 19, 2025)

Mount Semeru in East Java erupted again on Tuesday (19/8/2025) at 4:00 PM WIB. In the last week, Mount Semeru has erupted 5 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 eruption visual was not observed. The eruption of Mount Semeru was still ongoing when this report was made.

(Read: Due to Forest Fires, ARI in South Kalimantan Reaches 189 Thousand Cases by September 2023)

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on August 19, 2025, from 00:00-23:59 WIB showed 48 eruption earthquakes with amplitudes of 10-22 millimeters and a duration of 62-200 seconds.

Subsequently, there were 10 emission earthquakes with amplitudes of 3-7 millimeters and a duration of 29-62 seconds, and 1 harmonic earthquake with an amplitude of 3 millimeters and a duration of 129 seconds.

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

Throughout 2025, MAGMA Indonesia has recorded 5,691 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most, with 2,280 eruptions.

(Read: 55 Disasters Occurred in Mid-September 2023, Forest Fires Dominated)