Alert! Mount Semeru Erupts Again Tonight (Tuesday, 20 October 2026)
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Mount Semeru in East Java erupted again on Tuesday (20/10/2026) at 22:02 WIB. Over the past week, Mount Semeru has erupted 6 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption plume was not visually observed. Semeru's eruption was ongoing when this report was published.
(Read: Sanction Types For Companies Linked To Indonesian Peat & Forest Fires)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is currently at Activity Level III (Alert Status). Seismic monitoring between 12:00 - 18:00 WIB on 20 October 2026 recorded 9 eruption earthquakes (12-22 mm amplitude, 111-125 second duration).
Additionally, 16 degassing earthquakes (3-7 mm amplitude, 59-121 second duration) and 1 distant tectonic earthquake (2 mm amplitude, 28s S-P interval, 68 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along the Besuk Kobokan valley within 13 km from the summit. Outside this radius, no activity is permitted within 500 m of the Besuk Kobokan riverbanks, as hot pyroclastic surges and lahar flows may reach up to 17 km from the crater.
For 2026, MAGMA Indonesia recorded a total of 5,215 volcanic eruptions across the country. Mount Semeru (East Java) recorded the highest activity with 2,019 eruptions.
(Read: Burnt Area Across 6 Priority Wildfire Provinces; Central Kalimantan Worst Hit (12 Oct 2026))
"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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