Alert! Mount Semeru Erupts Again This Afternoon (Friday, 07 August 2026)
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Mount Semeru in East Java erupted again on Friday (7/8/2026) at 16:46 WIB. Over the past week, Mount Semeru has erupted 42 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 300 meters above the crater peak, or 3,976 meters above sea level.
The ash column appeared white to grey with thick density, drifting southwest. This eruption was recorded on seismograph with maximum amplitude 21 mm and duration 103 seconds.
(Read: Volcanic Eruption Trends Over Recent Years)
Per MAGMA Indonesia volcano activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 7 August 2026 between 06:00–12:00 WIB recorded 22 eruption earthquakes with amplitude 10–22 mm and duration 58–126 seconds.
Additionally, 2 rockfall earthquakes (amplitude 1–2 mm, 36–55 sec duration) and 5 gas emission tremors (amplitude 3–5 mm, 38–50 sec duration) were detected.
PVMBG urges: No activities are permitted in the southeast sector along the Besuk Kobokan area within 13 km from the summit. Outside this radius, all activity is prohibited within 500 meters of river banks along Besuk Kobokan, as this zone is at risk of pyroclastic surge expansion and lahar flows reaching up to 17 km from the peak.
For the year 2026, MAGMA Indonesia has logged 3,791 volcanic eruptions nationwide. East Java's Mount Semeru recorded the highest activity with 1,554 eruptions.
(Read: Indonesia Ranks First Globally for Number of Active Volcanoes)
"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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