Mount Semeru Erupted Again This Morning (Sunday, 21 June 2026)
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Mount Semeru in East Java erupted again on Sunday (21/6/2026) at 06:32 WIB. Over the past week, Mount Semeru has erupted 53 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 700 meters above the crater peak (4376 meters above sea level).
The ash column appeared white to grey, with thick density drifting westward. This eruption was registered on seismographs with maximum amplitude 22 mm and total duration 119 seconds.
(Read: Indonesia Has The Most Active Volcanoes In The World)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru remains at Alert Level III (Standby). Seismic monitoring between 00:00 - 06:00 WIB on 21 June 2026 recorded 15 eruption earthquakes with amplitude 10-22 mm and duration 55-202 seconds.
Additionally, 1 rockfall earthquake (6 mm amplitude, 71 sec duration) and 2 exhalation earthquakes (5-6 mm amplitude, 57-95 sec duration) were detected.
PVMBG has prohibited all activities in the southeast sector along Besuk Kobokan within 13 km of the summit eruption centre. Outside this zone, public activity is also banned within 500 meters of river banks along Besuk Kobokan, as this area is at risk from pyroclastic surges and lahar flows that can reach up to 17 km from the peak.
For the 2026 year to date, MAGMA Indonesia has logged 2,830 volcanic eruptions nationwide. Mount Semeru in East Java is the most active, accounting for 1,304 recorded eruptions.
(Read: Countries With Most Active Volcanoes Worldwide: Indonesia Ranks First)
"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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