Mount Semeru Erupts Again This Afternoon (Friday, February 20, 2026)

Mount Semeru in East Java erupted again on Friday (February 20, 2026) at 16:38 WIB. In the past week, Mount Semeru has erupted 54 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the ash column observed is about None meters above the peak or None meters above sea level.

No eruption visuals were observed. The eruption was recorded on the seismograph with a maximum amplitude of 22 millimeters and a duration of 139 seconds.

(Read: Indonesia Has the Most Active Volcanoes in the World)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level III (Alert). Earthquake observations on February 20, 2026 from 06:00-12:00 WIB showed 21 eruption/explosion earthquakes with amplitudes of 11-22 millimeters and durations of 71-115 seconds.

Then, 2 emission earthquakes with amplitudes of 4-6 millimeters and durations of 44-50 seconds, as well as 1 harmonic earthquake with an amplitude of 3 millimeters and a duration of 74 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 should not carry out activities within 500 meters of the riverbank along the Besuk Kobokan due to the potential for being affected by expanding pyroclastic flows and lahar flows up to 17 kilometers from the peak.

During 2026, MAGMA Indonesia has recorded 700 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 374 events.

(Read: Country with the Most Active Volcanoes in the World, Indonesia Ranks First)