Mount Semeru Erupts Again Tonight (Thursday, November 27, 2025)

Mount Semeru in East Java erupted again on Thursday (27/11/2025) at 00:29 WIB. In the last week, Mount Semeru has erupted 27 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.

No visual eruption was observed. The eruption of Mount Semeru was still ongoing when this report was made.

(Read: West Kalimantan Produced the Most CO2 Emissions from Forest and Land Fires Until July 2023)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level IV (Alert). Seismicity observations on November 27, 2025, from 18:00-23:59 WIB showed 45 eruption/explosion earthquakes with amplitudes of 12-22 millimeters and earthquake durations of 49-142 seconds.

Subsequently, there was 1 exhalation earthquake with an amplitude of 6 millimeters and an earthquake duration of 74 seconds, as well as 6 distant tectonic earthquakes with amplitudes of 6-14 millimeters S-P 13-16 seconds and earthquake durations of 29-57 seconds.

PVMBG urged not to carry out any activities in the southeast sector along Besuk Kobokan, as far as 20 kilometers from the peak (eruption center). Beyond that distance, people should not conduct activities within 500 meters from the riverbank (river boundary) along Besuk Kobokan due to the potential for expansion of hot clouds and lava flows.

Throughout 2025, MAGMA Indonesia has recorded 7,064 volcano eruptions/explosions across Indonesia. Mount Semeru in East Java erupted the most, with 2,839 occurrences.

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