Mount Semeru Erupts Again This Afternoon, Volcanic Ash Height Around 600 Meters
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Mount Semeru in East Java erupted again on Wednesday (5/8/2026) at 17:58 WIB. In the past week, Mount Semeru has erupted 21 times.
Based on eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 600 meters above the summit, or 4,276 meters above sea level.
The ash column was observed white to grey with thick intensity drifting northwest. This eruption was recorded on seismograph with maximum amplitude 21 mm and duration 100 seconds.
(Read: Floods Dominated Disaster Events in Indonesia Q1 2026)
According to MAGMA Indonesia volcanic activity reports, Mount Semeru activity status is at Level III (Alert). Seismic monitoring on 5 August 2026 06:00-12:00 WIB recorded 16 eruption earthquakes with amplitude 10-22 mm and duration 61-113 seconds.
Additionally: 1 rockfall earthquake (5 mm amplitude, 72 seconds duration) and 2 degassing earthquakes (2-7 mm amplitude, 29-56 seconds duration).
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km from the summit. Outside this zone, no activity is allowed within 500 m of river banks along Besuk Kobokan, as pyroclastic flows and lahars may reach up to 17 km from the summit.
During 2026, MAGMA Indonesia recorded 3,738 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1,533 eruptions.
(Read: Distribution of Fatalities from Floods & Landslides in West Sumatra (9 December 2025))
"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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