Mount Semeru Erupts on Sunday Afternoon, Status Alert

Mount Semeru in East Java erupted again on Sunday (January 11, 2026) at 3:38 PM WIB. In the last week, Mount Semeru has erupted 50 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 was observed to be around None meters above the peak (None meters above sea level).

Visual eruption was not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 115 seconds.

(Read: 4.7 M Earthquake Shakes Bonin Islands Region)

According to MAGMA Indonesia's volcanic activity report, Mount Semeru's activity level is at Level III (Alert). Seismicity observations on January 11, 2026, from 06:00-12:00 WIB showed 42 eruption tremors with amplitudes of 10-22 millimeters and durations of 58-156 seconds. In addition, there were 2 emission tremors with amplitudes of 5-8 millimeters and durations of 33-51 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the peak (eruption center). Beyond that distance, people should not engage in activities within 500 meters from the riverbanks (river borders) along Besuk Kobokan, as there is a potential for expansion of hot clouds and lava flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 160 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions, with 87 times.

(Read: 5.3 M Earthquake Shakes 17 Km West of Pasuquin,)