Alert! Mount Semeru Erupts Again This Morning (Monday, February 9, 2026)

Mount Semeru in East Java erupted again on Monday (February 9, 2026) at 05:50 WIB. In the past week, Mount Semeru only erupted once.

Quoting eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 500 meters above the peak or 4,176 meters above sea level.

The ash column was observed to be gray with thick intensity towards the northeast. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 113 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 February 9, 2026 from 18:00-23:59 WIB showed 23 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 89-159 seconds.

Then, 1 collapse earthquake with an amplitude of 2 mm and duration of 83 seconds, as well as 1 emission earthquake with an amplitude of 4 millimeters and duration of 50 seconds.

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

Throughout 2026, MAGMA Indonesia has recorded 521 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 268 events.

(Read: Number of Slightly Damaged Houses Due to Natural Disasters in Indonesia 2015-2024)