Alert! Mount Semeru Erupted Again This Morning (Friday, 21 August 2026)
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Mount Semeru in East Java erupted again on Friday (21/8/2026) at 08:27 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 app, the observed ash column reached approximately 800 meters above the summit (4,476 meters above sea level).
The ash column appeared white to grey with moderate intensity, drifting southwards. Mount Semeru eruption was ongoing at the time this report was published.
(Read: Five Latest Earthquakes Recorded by BMKG (Wednesday, 22 April 2026 12:17:58 WIB))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru activity status is set at Level III (Alert). Seismic monitoring on 21 August 2026 between 00:00–06:00 WIB recorded 28 eruption earthquakes with 15–22 mm amplitude and 60–153 second duration.
Additionally, 2 rockfall earthquakes (1–2 mm amplitude, 51–60 second duration) and 7 gas emission earthquakes (2–6 mm amplitude, 41–73 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km from the summit. Beyond this zone, public activities are forbidden within 500 meters of riverbanks along Besuk Kobokan, as this area remains at risk from pyroclastic surges and lahar flows reaching up to 17 km from the crater.
Throughout 2026, MAGMA Indonesia logged 4,153 volcanic eruptions across Indonesia. Mount Semeru (East Java) recorded the highest activity with 1,678 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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