Mount Semeru Erupts Again Tonight, Ash Column Height Around 200 Meters
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Mount Semeru in East Java erupted again on Sunday (13/9/2026) at 19:56 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 200 meters above the summit (3,876 meters above sea level).
The ash column was observed white to grey, with thin intensity drifting northwards. This eruption was recorded on seismographs with maximum amplitude 25 millimeters and duration of 104 seconds.
(Read: Indonesia Has The Most Active Volcanoes In The World)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 13 September 2026 between 12:00-18:00 WIB recorded 26 eruption earthquakes with 10-25 mm amplitude and 61-375 second duration.
Additionally, 5 fall earthquakes (2-6 mm amplitude, 35-74 seconds) and 5 emission earthquakes (3-9 mm amplitude, 61-98 seconds) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan up to 13 km from the summit. Outside this zone, public activity is banned within 500 meters of river banks along Besuk Kobokan, due to risk of pyroclastic surges and lahar flows reaching up to 17 km from the peak.
During 2026, MAGMA Indonesia recorded a total of 4,618 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,804 eruptions.
"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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