Mount Semeru Erupts Again Tonight (Tuesday, 8 September 2026)
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Mount Semeru in East Java erupted again on Tuesday (8/9/2026) at 18:23 WIB. This marks its 5th eruption in the past week.
According to eruption updates from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption plume was not visually observed. Mount Semeru eruption remained ongoing at the time this report was published.
(Read: Floods & Forest Fires: Most Frequent Disasters in Indonesia Throughout 2025)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Alert Level III. Seismic monitoring on 8 September 2026 between 12:00-18:00 WIB recorded 30 eruption earthquakes (10-22 mm amplitude, 45-130 second duration).
Additionally, 5 emission earthquakes (5-8 mm amplitude, 37-52 second duration) and 2 harmonic tremors (2-7 mm amplitude, 292-308 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, the public must avoid a 500-meter river buffer along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 km from the peak.
During 2026, MAGMA Indonesia has logged 4,504 volcanic eruptions nationwide. East Java's Mount Semeru is the most active, recording 1,759 eruptions.
(Read: Celios: Forest Fires Risk Erasing IDR 269.86 Billion in Local Tax Revenue)
"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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