Warning! Mount Semeru Erupted Again Tonight (Sunday, 17 May 2026)
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Mount Semeru in East Java erupted again on Sunday (17/5/2026) at 20:10 WIB. Over the past week, Mount Semeru has erupted 55 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 500 metres above the summit (4,176 metres above sea level).
The ash column appeared white to grey, with thick density drifting northwest. This eruption was registered on seismographs with maximum amplitude 22 mm and duration of 132 seconds.
(Read: Latest 5.3 M Magnitude Earthquake Shakes Banggai Islands Regency, Central Sulawesi)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is currently at Activity Level III (Alert Status). Seismic monitoring between 12:00–18:00 WIB on 17 May 2026 recorded 13 eruption earthquakes with amplitude 10–22 mm and duration 73–148 seconds.
Additionally, 2 degassing earthquakes (4–5 mm amplitude, 53–60 second duration) and 1 distant tectonic earthquake (40 mm amplitude, 18 s S-P interval, 108 second duration) were detected.
PVMBG advises all activity is prohibited in the southeast sector along Besuk Kobokan river within 13 km of the summit. Outside this zone, no activity is permitted within 500 m of Besuk Kobokan river banks, as this area is at risk of pyroclastic surges and lahar flows reaching up to 17 km from the crater.
For the year 2026, MAGMA Indonesia has logged 2,024 volcanic eruptions nationwide. Mount Semeru (East Java) accounts for the highest number with 1,029 recorded eruptions.
(Read: Earthquake Disaster Casualty Count in Indonesia: 2020–2024)
"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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