Mount Semeru Erupted Again Early This Morning (Sunday, 31 May 2026)
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Mount Semeru in East Java erupted again on Sunday (31/5/2026) at 04:36 WIB. Over the past week, Mount Semeru has erupted 50 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 appeared white to grey with thick intensity, drifting northwest. This eruption was recorded on seismographs with a maximum amplitude of 22 millimeters and lasted 137 seconds.
(Read: Distribution of Flood Points in Jakarta (13 January 2026, 08:00 WIB))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is currently at Alert Level III (Standby). Seismic monitoring on 31 May 2026 between 18:00–23:59 WIB recorded 18 eruption earthquakes with 10–22 mm amplitude and 78–139 second duration.
Additionally, 2 rockfall earthquakes (1–2 mm amplitude, 46–56 seconds) and 2 gas emission earthquakes (4–7 mm amplitude, 57–58 seconds) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Beyond this zone, people must avoid areas within 500 m of Besuk Kobokan riverbanks, as pyroclastic surges and lahar flows may reach up to 17 km from the summit.
For 2026 up to this date, MAGMA Indonesia has logged 2,243 volcanic eruptions across Indonesia; Mount Semeru accounts for the highest count at 1,126 eruptions.
(Read: Illnesses Affecting Sumatra Flood Victims as of 5 December 2025)
"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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