Mount Semeru Erupts Again Tonight (Sunday, January 18, 2026)

Mount Semeru in East Java erupted again on Sunday (18/1/2026) at 18:07 WIB. In the last week, Mount Semeru has erupted 53 times.

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

The visual eruption was not observed. Mount Semeru's eruption was still ongoing when this report was made.

(Read: 5.5 M Earthquake Shakes 262 Km East Of Levuka,)

According to the MAGMA Indonesia volcano activity report, Mount Semeru's activity level is at Level III (Alert). Seismicity observations on January 18, 2026, at 12:00-18:00 WIB showed 27 eruption earthquakes with amplitudes of 15-22 millimeters and earthquake durations of 69-129 seconds.

Then, 4 exhalation earthquakes with amplitudes of 4-5 millimeters and earthquake durations of 42-83 seconds, and 1 distant tectonic earthquake with an amplitude of 35 millimeters s-p 13 seconds and an earthquake duration of 40 seconds.

PVMBG urges against any activity in the southeastern 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 along Besuk Kobokan as there is 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 254 volcanic eruptions across Indonesia. Mount Semeru in East Java had the most eruptions with 142 times.

(Read: 4.16 M Earthquake Shakes Mona Passage)