Warning! This Morning Mount Semeru Erupts Again (Saturday, August 16, 2025)

Mount Semeru in East Java erupted again on Saturday (8/16/2025) at 08:56 AM WIB. In the last week, Mount Semeru has erupted 43 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 or None meters above sea level.

The eruption visuals were not observed. The eruption was recorded on a seismograph with a maximum amplitude of 21 millimeters and a duration of 106 seconds.

(Read: 4.16 M Earthquake Shakes Mona Passage)

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level II (Alert). Seismic observations on August 16, 2025, from 00:00-23:59 WIB showed 40 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and earthquake durations of 62-154 seconds.

Furthermore, there were 11 emission earthquakes with amplitudes of 4-8 millimeters and durations of 39-110 seconds, as well as 7 distant tectonic earthquakes with amplitudes of 5-24 millimeters S-P 11-63 seconds and durations of 40-150 seconds.

PVMBG advises 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 is advised not to engage in activities within 500 meters from the riverbanks (river border) along Besuk Kobokan as there is potential for expansion of hot clouds and lava flows up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 5,635 volcanic eruptions/explosions across Indonesia. Mount Semeru in East Java has erupted the most with 2,260 times.

(Read: Last Five Earthquakes Recorded by BMKG (Saturday, July 19, 2025 18:25:55 WIB))