Mount Semeru Erupts Again This Afternoon, Volcanic Ash Height Around 900 Meters
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Mount Semeru in East Java erupted again on Tuesday (9/6/2026) at 14:39 WIB. Over the past week, Mount Semeru has erupted 22 times.
According to eruption information from the Volcanology and Geological Disaster Mitigation Center (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 900 meters above the summit, or 4,576 meters above sea level.
The ash column was observed white to grey with moderate intensity, drifting northwards. Mount Semeru's eruption was still ongoing when this report was published.
(Read: Volcanic Eruption Trends Over Recent Years)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 9 June 2026 between 06:00-12:00 WIB recorded 13 eruption earthquakes with amplitude 11-22 mm and duration 66-120 seconds.
Additionally, 1 rockfall earthquake (2 mm amplitude, 42 seconds duration) and 3 emission earthquakes (2-3 mm amplitude, 25-39 seconds duration) were detected.
PVMBG advises against all activities in the southeast sector along Besuk Kobokan up to 13 km from the summit. Beyond this zone, residents must avoid areas within 500 meters of Besuk Kobokan river banks, as hot cloud surges and lahar flows may reach up to 17 km from the peak.
As of 2026, MAGMA Indonesia has logged 2,467 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,211 eruptions.
(Read: Indonesia Has the Most Active Volcanoes in the World)
"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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