TEMPO.CO, Jakarta – Indonesia’s Geological Agency has maintained Mount Semeru’s volcanic activity at Level III (Alert) as of Friday, January 16, 2026, signaling continued high activity at the East Java volcano in Lumajang.
The alert comes amid repeated pyroclastic flows from the peak.
Acting Head of the Geological Agency, Lana Saria, reported that pyroclastic flows occurred again on Thursday, January 15, traveling up to 4 kilometers from the summit.
The day before, the flows occurred twice, reaching distances of 5 kilometers. The flows have been primarily directed toward the southeast sector, in the direction of Besuk Kobokan.
Between January 7–14, the volcano produced…