Warning! Mount Semeru Erupts Again Tonight (Monday, February 9, 2026)

Mount Semeru in East Java erupted again on Monday (February 9, 2026) at 19:21 WIB. In the past week, Mount Semeru has erupted 11 times.

Quoting eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the ash column was observed at around None meters above the peak or 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 volcano activity report, the activity level of Mount Semeru is at Level III (Alert). Earthquake observations on February 9, 2026 from 12:00-18:00 WIB showed 20 eruption/explosion earthquakes with an amplitude of 10-22 millimeters and a duration of 45-134 seconds.

Then, 3 emission earthquakes with an amplitude of 2-4 millimeters and a duration of 30-38 seconds, as well as 1 volcanic flood earthquake with an amplitude of 10 millimeters and a duration of 3720 seconds.

PVMBG advises against any activities in the southeast sector along the Besuk Kobokan, within 13 kilometers of the peak (eruption center). Outside this distance, residents are advised not to carry out activities within 500 meters of the riverbank along the Besuk Kobokan due to the potential for being affected by the expansion of hot clouds and lahar flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 537 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions with 278 events.

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