Alert! Mount Semeru Erupts Again Tonight (Wednesday, 20 May 2026)
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Mount Semeru in East Java erupted again on Wednesday (20/5/2026) at 18:56 WIB. Over the past week, Mount Semeru has erupted 12 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia app, the eruption visual was not observed. Mount Semeru's eruption was ongoing when this report was published.
(Read: Volcanic Eruption Trends In Recent Years)
Per MAGMA Indonesia volcano activity reports, Mount Semeru is at activity Level III (Alert). Seismic monitoring on 20 May 2026 12:00-18:00 WIB recorded 15 eruption earthquakes with 10-22 mm amplitude and 63-152 second duration.
Additionally, 4 emission earthquakes (4-5 mm amplitude, 30-61 sec duration) and 3 distant tectonic earthquakes (4-35 mm amplitude, 18-78 sec S-P interval, 60-219 sec duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, residents must avoid the 500 m riverbank buffer along Besuk Kobokan, as pyroclastic surges and lahars may reach up to 17 km from the peak.
Throughout 2026, MAGMA Indonesia logged 2,072 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,041 eruptions.
(Read: Indonesia Ranks First Globally For Most Active Volcanoes)
"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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