Mount Semeru Erupts Again Tonight (Sunday, September 14, 2025)

Mount Semeru in East Java erupted again on Sunday (September 14, 2025) at 09:35 PM WIB. In the last week, Mount Semeru has erupted 44 times.

According to 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 approximately None meters above the peak (None meters above sea level).

The visual of the eruption was not observed. The eruption of Mount Semeru was still ongoing when this report was made.

(Read: Indonesia Has the Most Active Volcanoes in the World)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level II (Alert). Seismicity observations on September 14, 2025, from 00:00-23:59 WIB showed 44 eruption/explosion earthquakes with amplitudes of 13-22 millimeters and durations of 55-151 seconds.

Additionally, there were 4 exhalation earthquakes with amplitudes of 4-8 millimeters and durations of 33-61 seconds, and 2 harmonic tremors with an amplitude of 8 millimeters and durations of 96-170 seconds.

PVMBG advises against any activities in the southeastern sector along Besuk Kobokan, as far as 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 6,098 volcano eruptions across Indonesia. Mount Semeru in East Java has erupted the most, with 2,446 occurrences.

(Read: Volcanic Eruption Trends in Recent Years)