Inp.polri.go.id - Lumajang.  Mount Semeru erupted on Tuesday morning (11/2/2025), sending an ash column 700 meters above its peak, reaching an altitude of approximately 4,376 meters above sea level.

The eruption, recorded at 7.11 am local time, produced white to gray volcanic ash drifting northward, according to Liswanto, an official at the Semeru monitoring post. 

It was the fourth eruption of the day, following earlier tremors at 1.05 am, 3.55 am, and 7.01 am.

Authorities maintain Semeru’s alert status, warning residents to stay at least 8 km away from the Besuk Kobokan sector and avoid areas within 500 meters of riverbanks due to potential pyroclastic flows. A 3-km exclusion zone around the crater remains in effect due to falling incandescent rocks.

Local residents are also advised to remain vigilant for possible lava flows and lahar triggered by heavy rainfall, particularly in Besuk Kobokan and nearby rivers.

(mg/inp/pr/nm)