Mount Semeru Erupts Again This Afternoon (Thursday, February 12, 2026)

Mount Semeru in East Java erupted again on Thursday (February 12, 2026) at 1:24 PM WIB. In the past week, Mount Semeru has erupted 31 times.

Citing eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached None meters above the peak (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 130 seconds.

(Read: Jakarta Flood Points Increase (January 23, 2026 at 12:00 PM WIB))

According to the MAGMA Indonesia volcanic activity report, Mount Semeru's activity level is at Level III (Alert). Earthquake observations on February 12, 2026 from 6:00 AM to 12:00 PM WIB showed 18 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 73-127 seconds.

Then, 2 avalanche earthquakes with amplitudes of 8-10 mm and durations of 43-62 seconds, as well as 3 emission earthquakes with amplitudes of 3-4 millimeters and durations of 67-70 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, up to 13 kilometers from the peak (eruption center). Beyond that distance, residents should avoid activities within 500 meters of the riverbanks 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 574 volcanic eruptions across Indonesia. Mount Semeru in East Java has the highest number of eruptions with 298 events.

(Read: 295 People Killed by Floods and Landslides in North Sumatra, Here's the Distribution (December 4, 2025))