Mount Semeru Erupted Again This Afternoon, Ash Column Reached Around 400 Meters
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Mount Semeru in East Java erupted again on Friday (12/6/2026) at 17:47 WIB. In the past week, Mount Semeru has erupted 51 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached 400 meters above the summit (4,076 meters above sea level).
The ash column appeared white to grey, thick intensity, drifting southwest. This eruption was recorded on seismograph with maximum 21 mm amplitude and 77 seconds duration.
(Read: 12 Million Indonesians Affected by Natural Disasters in 2025)
Per MAGMA Indonesia volcanic activity report, Mount Semeru remains at Activity Level III (Alert). Seismic monitoring on 12 June 2026 06:00-12:00 WIB recorded 14 eruption earthquakes (15-22 mm amplitude, 88-145 sec duration).
Additionally: 1 rockfall earthquake (1 mm, 45 sec) and 1 gas emission earthquake (4 mm, 44 sec).
PVMBG warns: NO activities allowed in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, avoid 500m from river banks along Besuk Kobokan – pyroclastic flows and lahar may reach up to 17 km from the peak.
For 2026, MAGMA Indonesia logged 2,586 volcanic eruptions nationwide. Mount Semeru (East Java) is the most active with 1,240 recorded eruptions.
(Read: Floods Dominated Natural Disasters in Indonesia Late February 2024)
"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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