Mount Semeru Erupts Again This Afternoon, Eruption Height Around 400 Meters
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Mount Semeru in East Java erupted again on Thursday (1/10/2026) at 15:54 WIB. Over the past week, Mount Semeru has erupted 35 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height was around 400 meters above the summit, or 4,076 meters above sea level.
The ash column was observed grey, thick intensity, drifting northeast. This eruption was recorded on seismograph with maximum amplitude 22 mm and duration 169 seconds.
(Read: Indonesia Has The Most Active Volcanoes In The World)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru activity status is set at Level III (Alert). Seismic monitoring on 1 October 2026 06:00-12:00 WIB recorded 25 eruption earthquakes with amplitude 15-22 mm and duration 59-141 seconds.
Additionally, 2 collapse earthquakes (amplitude 2-15 mm, 46-152 sec duration) and 7 emission earthquakes (amplitude 3-6 mm, 32-54 sec duration) were detected.
PVMBG advises: No activities are allowed in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, do not operate within 500 m of river banks along Besuk Kobokan, as this area is at risk of pyroclastic surges and lahars reaching up to 17 km from the summit.
During 2026, MAGMA Indonesia has recorded 4,886 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,901 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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