Mount Semeru Erupts Again Tonight (Tuesday, 6 October 2026)
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Mount Semeru in East Java erupted again on Tuesday (6/10/2026) at 18:43 WIB. Over the past week, this volcano has erupted 8 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. The eruption was still ongoing when this report was published.
(Read: Volcanic Eruption Trends in Recent Years)
Per MAGMA Indonesia activity reports, Mount Semeru is currently set at Activity Level III (Alert). Seismic monitoring on 6 October 2026 between 12:00–18:00 WIB recorded 27 eruption earthquakes (10–25 mm amplitude, 63–199 second duration), 2 rockfall earthquakes (3–4 mm amplitude, 47–92 second duration), and 4 gas emission earthquakes (3–6 mm amplitude, 44–68 second duration).
PVMBG has prohibited all activity along the Besuk Kobokan southeast sector within 13 km of the summit. Beyond this zone, residents must also avoid activity within 500 m of river banks along Besuk Kobokan – this area remains at risk from pyroclastic surges and lahars reaching up to 17 km from the crater.
For the year 2026, MAGMA Indonesia has documented 4,958 volcanic eruptions nationwide. Mount Semeru is the most active volcano, accounting for 1,927 recorded eruptions.
(Read: Countries With The Most Active Volcanoes Worldwide: Indonesia Ranks First)
"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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