Mount Semeru Erupts Again Tonight (Friday, 25 September 2026)
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Mount Semeru in East Java erupted again on Friday (25/9/2026) at 22:40 WIB. Over the past week, Mount Semeru has erupted 15 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached approximately 700 metres above the summit (4,376 metres above sea level).
The ash column appeared white to grey with moderate intensity, drifting northward. Semeru's eruption was still ongoing at the time this report was published.
(Read also: Flash Floods in Nepal-Tibet Killed 584 People (Friday, 28 August 2026))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru remains at Alert Level III (Standby). Seismic monitoring on 25 September 2026 between 12:00–18:00 WIB recorded 25 eruption earthquakes with 15–22 mm amplitude and 90–158 second duration.
Additionally, 1 rockfall earthquake (12 mm amplitude, 85 seconds duration) and 2 degassing earthquakes (3–4 mm amplitude, 45–49 seconds duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, residents must avoid all activity within 500 m of river banks along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 km from the peak.
Throughout 2026, MAGMA Indonesia logged 4,785 volcanic eruptions across Indonesia. Mount Semeru recorded the highest number with 1,852 eruptions.
(Read also: Disaster Occurrences in Indonesia First Semester 2026: Floods Most Frequent)
"Disclosure: This is an AI-generated translation of the original article. We strive for accuracy, but please note that automated translations may contain errors or slight inconsistencies."
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