Warning! This Morning Mount Semeru Erupts Again (Friday, August 22, 2025)

Mount Semeru in East Java erupted again on Friday (8/22/2025) at 07:39 AM WIB. In the last week, Mount Semeru has erupted 24 times.

Based on 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 200 meters above the peak (3,876 meters above sea level).

The ash column was observed to be gray with moderate to thick intensity towards the west. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 124 seconds.

(Read: Global Economic Losses Due to Floods Decreased in 2023)

According to MAGMA Indonesia''s volcano activity report, Mount Semeru''s activity level is at Level II (Alert). Seismic observations on August 22, 2025, from 00:00-23:59 WIB showed 43 eruption/explosion earthquakes with amplitudes of 12-22 millimeters and durations of 68-234 seconds.

Furthermore, there was 1 rockfall earthquake with an amplitude of 4 mm and a duration of 77 seconds, and 16 exhalation earthquakes with amplitudes of 2-8 millimeters and durations of 35-79 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, within 8 kilometers from the peak (eruption center). Beyond that distance, the public is advised not to 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 5,735 volcano eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 2,299 occurrences.

(Read: Floods and Earthquakes, Disaster Risks in IKN''s Core Area)