Alert! Mount Semeru Erupted Again This Afternoon (Thursday, 21 May 2026)
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Mount Semeru in East Java erupted again on Thursday (21/5/2026) at 17:22 WIB. In the past week, Mount Semeru has erupted 23 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption was not visually observed. Mount Semeru's eruption was still ongoing when this report was published.
(Read: BNPB Recorded 52 Natural Disasters Mid August 2023, Most Were Forest Fires)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is at Activity Level III (Alert). Seismic monitoring on 21 May 2026 between 06.00-12.00 WIB recorded 17 eruption earthquakes with 10-22 mm amplitude and 74-195 second duration, plus 4 emission earthquakes of 4-6 mm amplitude and 45-69 second duration.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan up to 13 km from the summit. Outside this zone, no activities are permitted within 500 meters of Besuk Kobokan river banks, as pyroclastic surges and lahars may reach up to 17 km from the peak.
During 2026, MAGMA Indonesia has recorded 2,092 volcanic eruptions across Indonesia. Mount Semeru in East Java accounts for the highest number, with 1,052 eruptions.
(Read: NTT Suffered Forest Fires For 10 Straight Years, BMKG Urges Increased Preparedness)
"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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