Warning! Mount Semeru Erupted Again This Afternoon (Tuesday, 11 August 2026)
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Mount Semeru in East Java erupted again on Tuesday (11/8/2026) at 12:49 WIB. Over the past week, Mount Semeru has erupted 14 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption plume was not visually observed. Mount Semeru's eruption was still ongoing at the time this report was published.
(Read: Indonesia Natural Disaster Death Toll Rose Sharply in 2024)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 11 August 2026 between 06:00-12:00 WIB recorded 21 eruption earthquakes with amplitude 10-27 mm and duration 46-82 seconds.
Additionally, 3 degassing earthquakes (4-6 mm amplitude, 19.73-39 second duration), and 2 distant tectonic earthquakes (10-33 mm amplitude, S-P interval 19.82-26.82 seconds, 73-86 second 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 activity within 500 m of river banks along Besuk Kobokan, as pyroclastic surge and lahar flows may reach up to 17 km from the crater.
For 2026 so far, MAGMA Indonesia has logged 3,890 volcanic eruptions across Indonesia; East Java's Mount Semeru is the most active with 1,591 recorded eruptions.
(Read: Count of Moderately Damaged Houses from Indonesian Natural Disasters 2015-2024)
"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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