Alert! Mount Semeru Erupted Again This Afternoon (Monday, 8 June 2026)
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Mount Semeru in East Java erupted again on Monday (8/6/2026) at 17:29 WIB. Over the past week, Mount Semeru has erupted 7 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached approximately 800 meters above the crater (4,476 meters above sea level).
The ash column appeared white to grey, with thick intensity drifting westward. The eruption was recorded on seismographs with a maximum amplitude of 22 millimetres and lasted 112 seconds.
(Read: Indonesia Has The Most Active Volcanoes In The World)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is currently set at Activity Level III (Alert Status). Seismic monitoring on 8 June 2026 between 06:00–12:00 WIB recorded 16 eruption earthquakes with 13–22 mm amplitude and 69–122 second duration.
Additionally, 4 collapse earthquakes (2–3 mm amplitude, 31–110 second duration) and 2 emission earthquakes (2–6 mm amplitude, 30–59 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along the Besuk Kobokan valley within 13 kilometres of the summit. Outside this zone, residents must avoid areas within 500 metres of river banks along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 kilometres from the crater.
During 2026 up to this date, MAGMA Indonesia has logged 2,431 volcanic eruptions across Indonesia. Mount Semeru in East Java accounts for the highest number with 1,196 eruptions.
(Read: Indonesia Ranks First Globally For Number Of Active Volcanoes)
"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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