Warning! Mount Semeru Erupts Again Tonight (Monday, 28 September 2026)
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Mount Semeru in East Java erupted again on Monday (28/9/2026) at 00:18 WIB. Over the past week, Mount Semeru has erupted only once.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached 300?metres above the summit (3?976?m above sea level).
The ash column appeared white to grey with moderate intensity, drifting southeast. Semeru's eruption was ongoing at the time of this report.
(Related: 2 out of 6 priority wildfire provinces recorded zero hotspots, 22 September 2026)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru remains at Alert Level?III (Standby). Seismic monitoring between 18:00?23:59 WIB on 28?September?2026 registered: 25 eruption earthquakes (amplitude?11?23?mm, duration?92?148?s); 3 rockfall earthquakes (2?3?mm, 32?60?s); and 2 gas emission earthquakes (5?7?mm, 53?56?s).
PVMBG prohibits all activities southeast along the Besuk Kobokan river valley within 13?km of the summit. Beyond this zone, people must also avoid a 500?metre buffer along Besuk Kobokan river banks: pyroclastic surges and lahars may travel up to 17?km from the peak.
During 2026, MAGMA Indonesia logged 4?819 volcanic eruptions nationwide. Mount Semeru was the most active, with 1?867 recorded eruptions this year.
(Related: Hotspot count update for 6 wildfire priority provinces, 9 September 2026)
"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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