Sand miner trapped by large lahar on Mount Semeru, Indonesia
A large lahar triggered by heavy rains on Mount Semeru trapped a man in the Regoyo River in East Java, on Sunday, December 21, 2025.
Heavy rainfall over Mount Semeru caused a lahar that struck the Regoyo River in Lumajang Regency, East Java, on Sunday.
The lahar was first recorded at around 13:00 local time (LT) with a maximum amplitude of 45 mm (1.77 inches), according to the Mount Semeru Volcano Observation Post (PPGA).
A sand miner was trapped in the middle of the Regoyo River during the lahar’s peak flow, according to Kompas.
In addition, roads leading to three hamlets in Gondoruso Village and Tempursari District were reported to be cut off after the overflow bridge.
Featured image credit: Liputan6
I am an Assistant Editor and Severe Weather & Science Journalist at The Watchers, specializing in real-time severe weather coverage, geophysical event reporting, and research-driven scientific analysis. You can reach me at rishav(at)watchers(.)news.
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