Warning! Mount Semeru Erupts Again This Afternoon (Friday, March 20, 2026)

Mount Semeru in East Java erupted again on Friday (March 20, 2026) at 4:13 PM WIB. In the past week, Mount Semeru has erupted 46 times.

Quoting eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached None meters above the peak (None meters above sea level).

No eruption visuals were observed. The eruption of Mount Semeru was still ongoing when this report was made.

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According to the MAGMA Indonesia volcanic activity report, the activity level of Mount Semeru is at Level III (Alert). Earthquake observations on March 20, 2026 from 6:00 AM to 12:00 PM WIB showed 17 eruption/explosion earthquakes with amplitudes of 15-22 millimeters and durations of 55-142 seconds.

Then, 4 emission earthquakes with amplitudes of 4-5 millimeters and durations of 37-101 seconds, as well as 1 deep volcanic earthquake with an amplitude of 6 millimeters, s-p 2.2 seconds, and duration of 25 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, up to 13 kilometers from the peak (eruption center). Beyond that distance, residents should not carry out activities within 500 meters of the riverbank along Besuk Kobokan due to the potential for being affected by expanding pyroclastic flows and lahar flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 1,104 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 595 events.

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