Warning! Mount Semeru Erupts Again Early This Morning (Saturday, March 21, 2026)

Mount Semeru in East Java erupted again on Saturday (March 21, 2026) at 02:12 WIB. In the past week, Mount Semeru has erupted 48 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 1,000 meters above the peak or 4,676 meters above sea level.

The ash column was observed to be white to gray with thick intensity towards the southeast. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 388 seconds.

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According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level III (Alert). Earthquake observations on March 21, 2026 from 18:00 to 23:59 WIB showed 16 eruption/explosion earthquakes with amplitudes of 12-22 millimeters and durations of 89-121 seconds.

Then, 3 emission earthquakes with amplitudes of 3-8 millimeters and durations of 54-86 seconds, as well as 4 harmonic earthquakes with amplitudes of 2 millimeters and durations of 89-652 seconds.

PVMBG advises against any activities in the southeast sector along the Besuk Kobokan, within 13 kilometers of the peak (eruption center). Beyond that distance, residents should avoid activities within 500 meters of the riverbank along the Besuk Kobokan due to the potential for being affected by expanding hot clouds and lava flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 1,107 volcanic eruptions across Indonesia. Mount Semeru in East Java has the highest number of eruptions with 597 eruptions.

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