Warning! Mount Semeru Erupted Again This Morning (Sunday, 11 October 2026)
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Mount Semeru in East Java erupted again on Sunday (11/10/2026) at 05:34 WIB. Over the past week, Mount Semeru has erupted 35 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached approximately 1,000 meters above the peak, or 4,676 meters above sea level.
The ash column appeared white to grey with thick intensity, drifting eastwards. This eruption was recorded on seismographs with maximum amplitude 25 mm and duration 131 seconds.
(Read: Indonesia Had the Worst Air Quality in ASEAN in 2022)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru remains at Activity Level III (Alert). Seismic monitoring on 11 October 2026 between 18:00-23:59 WIB recorded 30 eruption earthquakes with amplitude 10-24 mm, lasting 64-161 seconds each.
Additionally, 9 emission earthquakes (4-9 mm amplitude, 43-81 sec duration) and 6 harmonic tremors (2-21 mm amplitude, 179-458 sec 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 also avoid activity within 500 meters of river banks along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 km from the peak.
During 2026, MAGMA Indonesia logged 5,042 volcanic eruptions nationwide. East Java's Mount Semeru recorded the highest activity with 1,954 eruptions.
(Read: Kurious Survey: Majority Rate Indonesia's Air Quality as Poor)
"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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