Mount Semeru Erupts Again This Morning (Tuesday, January 27, 2026)

Mount Semeru in East Java erupted again on Tuesday (January 27, 2026) at 10:30 AM Western Indonesian Time (WIB). In the last week, Mount Semeru has erupted 11 times.

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

Eruption visuals were not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 103 seconds.

(Read: Area of Rice Fields, Land, and Gardens in Indonesia Damaged by Floods 2020-2024)

According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level III (Alert). Seismic observations on January 27, 2026, from 00:00-06:00 WIB showed 27 eruption/explosion earthquakes with amplitudes of 12-22 millimeters and durations of 85-174 seconds.

Then, 1 landslide earthquake with an amplitude of 6 mm and a duration of 36 seconds, and 2 emission earthquakes with amplitudes of 4-7 millimeters and durations of 33-38 seconds occurred.

PVMBG urges against any activities in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the peak (eruption center). Beyond this distance, the public is advised not to 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 361 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most, with 193 eruptions.

(Read: Floods and Extreme Weather, Most Frequent Disasters in Indonesia in 2025)