Mount Semeru Erupted Again This Afternoon (Monday, 11 May 2026)
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Mount Semeru in East Java erupted again on Monday (11/5/2026) at 12:45 WIB. Over the past week, Mount Semeru has erupted 5 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, observed ash column height is not recorded above the summit nor above sea level.
The eruption was not visually observed; it was recorded on seismograph with maximum 22 mm amplitude, 124 seconds duration.
(Read: Two Months of Sumatra Floods: 1,204 Dead, 140 Missing (Tuesday, 27 January 2026))
Per MAGMA Indonesia activity reports, Mount Semeru remains at Alert Level III. Seismic monitoring 06:00-12:00 WIB 11 May 2026 recorded 18 eruption earthquakes (11-22 mm amplitude, 57-148 sec duration).
Additionally: 2 collapse quakes (3 mm amplitude, 41-51 sec), 3 emission tremors (2-6 mm amplitude, 34-72 sec).
PVMBG prohibits all activity in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, no activity is allowed within 500 m of Besuk Kobokan riverbanks due to pyroclastic flow / lahar hazard up to 17 km from the summit.
As of 2026, MAGMA Indonesia logged 1,907 volcanic eruptions nationwide; East Java's Mount Semeru recorded the highest count at 979 eruptions.
(Read: Jakarta Flood Location Map (13 January 2026, 08:00 WIB))
"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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