Mount Semeru Erupts Again This Morning (Wednesday, April 22, 2026)

Mount Semeru in East Java erupted again on Wednesday (April 22, 2026) at 05:22 WIB. In the past week, Mount Semeru has erupted 12 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 600 meters above the peak (4,276 meters above sea level).

The observed ash column was gray with thick intensity heading west. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 120 seconds.

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According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level III (Alert). Seismic observations on April 22, 2026, from 18:00 to 23:59 WIB showed 19 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 95-141 seconds.

Then, 5 emission earthquakes with amplitudes of 2-4 millimeters and durations of 71-112 seconds, as well as 1 harmonic earthquake with an amplitude of 2 millimeters and a duration of 496 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 not carry out 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.

In 2026, MAGMA Indonesia has recorded 1,599 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 844 events.

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