Mount Semeru Erupted Again This Morning (Monday, 13 July 2026)
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Mount Semeru in East Java erupted again on Monday (13/7/2026) at 09:21 WIB. Over the past week, Mount Semeru has erupted 5 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached approximately 900 metres above the summit, or 4576 metres above sea level.
The ash column appeared white to grey, with thick density drifting east and southeast. This eruption was recorded on seismographs with maximum amplitude 22 mm and 106 seconds duration.
(Read: Number of Damaged Houses due to Sumatra Floods & Landslides (17 December 2025))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru remains at Activity Level III (Alert). Seismic monitoring on 13 July 2026 00:00-06:00 WIB recorded 18 eruption earthquakes (12-22 mm amplitude, 95-132 second duration).
Additionally, 4 rockfall earthquakes (2-3 mm amplitude, 45-73 second duration) and 2 harmonic tremors (10-13 mm amplitude, 77-221 second duration) were detected.
PVMBG advises against all activity in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, public activity is prohibited within 500 metres of river banks along Besuk Kobokan, as pyroclastic flows and lahars may reach up to 17 km from the crater.
For the year 2026, MAGMA Indonesia has logged 3145 volcanic eruptions across Indonesia. East Java's Mount Semeru recorded the highest activity with 1390 eruptions.
(Read: Floods Dominated Disaster Events in Indonesia Q1 2026)
"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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