Mount Semeru Erupts Again This Afternoon (Thursday, April 9, 2026)

Mount Semeru in East Java erupted again on Thursday (April 9, 2026) at 5:10 PM WIB. In the last week, Mount Semeru has erupted 34 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the observed ash column is 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.

(Read: From Earthquakes to Droughts, These are Natural Disasters That Often Occur in Indonesia Until Mid-2023)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level III (Alert). Seismic observations on April 9, 2026 from 6:00 AM to 12:00 PM WIB showed 18 eruption/explosion earthquakes with an amplitude of 10-22 millimeters and a duration of 55-181 seconds.

Then, 1 collapse earthquake with an amplitude of 10 mm and a duration of 80 seconds, as well as 2 emission earthquakes with an amplitude of 6-8 millimeters and a duration of 49-51 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, up to 13 kilometers from the peak (eruption center). Outside that distance, residents should not carry out activities within 500 meters of the riverbank along 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 1,381 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 742 occurrences.

(Read: 4.16 M Earthquake Shakes Mona Passage)