Alert! Mount Semeru Erupted Again This Morning (Saturday, 12 September 2026)
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Mount Semeru in East Java erupted again on Saturday (12/9/2026) at 10:22 WIB. Over the past week, Mount Semeru has erupted 34 times.
According to eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption was not visually observed. It was recorded on seismographs with maximum amplitude 22 mm and duration 135 seconds.
(Read: Air Quality in Major Indonesian Cities is Poor, Far Below WHO Standards)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is at Activity Level III (Alert). Seismic monitoring on 12 September 2026 00:00-06:00 WIB recorded 27 eruption earthquakes (10-24 mm amplitude, 85-171 second duration).
Additionally: 5 rockfall earthquakes (1-7 mm, 47-74 sec), 2 gas emission earthquakes (4-5 mm, 72-87 sec).
PVMBG prohibits all activities in the Besuk Kobokan southeast sector within 13 km of the summit. Outside this zone, avoid 500 m from Besuk Kobokan river banks; pyroclastic flows and lahars may reach 17 km from the peak.
For 2026, MAGMA Indonesia logged 4,590 volcanic eruptions nationwide. Mount Semeru recorded the highest count at 1,788 eruptions.
(Read: Bangladesh Has World's Worst Air Quality – How Does Indonesia Compare?)
"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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