Mount Semeru lava flood triggers secondary eruption at river channels in Indonesia

Published date: Wed, 18 Feb 2026 11:30:44 +0700

Dramatic footage captured the moment lava flows collided with hot volcanic deposits on Mount Semeru, triggering massive columns of steam and ash.
Footage shows a cloud of steam rising as the molten surge moved downhill following heavy rain in East Java, Indonesia, on February 17.
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