Mount Semeru Erupts Again This Morning (Wednesday, August 27, 2025)

Mount Semeru in East Java erupted again on Wednesday (8/27/2025) at 08:56 AM WIB. In the last week, Mount Semeru has erupted 21 times.

Citing 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 eruption visual was not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 118 seconds.

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

According to the MAGMA Indonesia volcano activity report, Mount Semeru''s activity level is at Level II (Alert). Seismic observations on August 27, 2025, from 00:00-23:59 WIB showed 41 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 55-202 seconds.

Then, 3 times of avalanche earthquakes with amplitudes of 3-6 mm and durations of 51-78 seconds, and 6 times of emission earthquakes with amplitudes of 2-6 millimeters and durations of 34-64 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, people should not conduct activities within 500 meters from the river bank (river border) 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 5,823 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,330 times.

(Read: Jakarta Roads Still Flooded (July 9, 2025 at 09:00 AM WIB))