Mount Semeru Erupts Again This Morning, Ash Column Height 900 Meters Above Peak

Mount Semeru in East Java erupted again on Friday (April 10, 2026) at 07.25 WIB. In the past week, Mount Semeru has erupted 42 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 900 meters above the peak (4,576 meters above sea level).

The ash column was observed to be white to gray with moderate intensity towards the north. The eruption of Mount Semeru was still ongoing when this report was made.

(Read: Even After Being Rained On, Jakarta's Air Quality Remains Poor)

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level III (Alert). Earthquake observations on April 10, 2026 from 00.00-06.00 WIB showed 19 eruption/explosion earthquakes with an amplitude of 10-22 millimeters and a duration of 79-198 seconds.

Then, 4 emission earthquakes with an amplitude of 2-7 millimeters and a duration of 54-71 seconds, as well as 2 distant tectonic earthquakes with an amplitude of 10-30 millimeters, s-p 15-20 seconds, and a duration of 34-83 seconds.

PVMBG advises against any activities in the southeast sector along the Besuk Kobokan, up to 13 kilometers from the peak (eruption center). Beyond that 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 lava flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 1,392 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 750 events.

(Read: Jakarta's Air Quality This Morning is the Third Worst in the World (Tuesday, June 6, 2023))