Alert! Mount Semeru Erupted Again This Morning (Thursday, 18 June 2026)
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Mount Semeru in East Java erupted again on Thursday (18/6/2026) at 06.39 WIB. Over the past week, Mount Semeru has erupted 35 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia app, the observed ash column reached approximately 1,000 meters above the crater peak (4,676 meters above sea level).
The ash column appeared white to grey with moderate intensity, drifting northward. Semeru eruption was ongoing at the time this report was published.
(Read also: Floods & Forest Fires: Most Frequent Disasters in Indonesia Throughout 2025)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru status is set at Level III (Alert). Seismic monitoring between 00.00-06.00 WIB on 18 June 2026 recorded 15 eruption earthquakes with amplitude 12-22 mm, duration 93-173 seconds.
Additionally, 2 rockfall earthquakes (amplitude 2-6 mm, 52-80 sec duration) and 5 degassing tremors (amplitude 2-6 mm, 49-85 sec duration) were detected.
PVMBG prohibits all activities in the southeast sector along the Besuk Kobokan valley within 13 km of the summit. Outside this zone, public activity is banned within 500 meters of river banks along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 km from the peak.
During 2026, MAGMA Indonesia has logged 2,760 volcanic eruptions across the country. East Java's Mount Semeru recorded the highest activity with 1,286 eruptions.
(Read also: Fatal Casualty Distribution from Aceh Floods & Landslides (9 December 2025))
"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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