PVMBG: Mount Semeru Erupts Again, 13 Eruptions Recorded Today
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Mount Semeru in East Java erupted again on Tuesday (11/8/2026) at 16:55 WIB. Over the past week, Mount Semeru has erupted 16 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption visual was not observed. Mount Semeru's eruption was still ongoing when this report was published.
(Read: Jakarta Morning Air Quality Ranked 3rd Worst Globally (Tuesday, 6 June 2023))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru activity status is set at Level III (Alert). Seismic monitoring on 11 August 2026 between 06:00-12:00 WIB recorded 21 eruption earthquakes with 10-27 mm amplitude and 46-82 second duration.
Additionally, 3 emission earthquakes (4-6 mm amplitude, 19.73-39 second duration), plus 2 distant tectonic earthquakes (10-33 mm amplitude, 19.82-26.82 second S-P interval, 73-86 second total duration) were detected.
PVMBG advises against ALL activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this radius, residents must avoid activities within 500 meters of riverbanks along Besuk Kobokan: this zone faces risk from extended pyroclastic flows and lahar runout up to 17 km from the crater.
For 2026 up to this date, MAGMA Indonesia logged 3,894 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,593 eruptions.
"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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