Mount Semeru Erupts Again This Afternoon, Eruption Height Reaches 500 Meters Above the Summit
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Mount Semeru in East Java erupted again on Thursday (11/6/2026) at 17.05 WIB. In the past week, Mount Semeru has erupted 43 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 500 meters above the summit (4,176 meters above sea level).
The ash column was observed to be white to grey with thick intensity drifting southwest. This eruption was recorded on seismographs with maximum amplitude 22 mm and duration 130 seconds.
(Read: Floods: Natural Disasters That Frequently Hit Indonesia As Of September 2025)
Per MAGMA Indonesia volcano activity reports, Mount Semeru status is set at Level III (Alert). Seismic monitoring on 11 June 2026 06.00-12.00 WIB recorded 18 eruption earthquakes with 12-22 mm amplitude and 62-123 second duration.
Additionally, 1 rockfall earthquake (3 mm amplitude, 38 seconds) and 6 degassing earthquakes (5-7 mm amplitude, 38-61 seconds) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, public activity is also banned within 500 m of river banks along Besuk Kobokan, as pyroclastic flows and lahar may reach up to 17 km from the summit.
During 2026, MAGMA Indonesia recorded 2,545 volcanic eruptions across Indonesia. Mount Semeru (East Java) recorded the highest activity with 1,232 eruptions.
(Read: Natural Disaster Fatalities In Indonesia Increased Sharply In 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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