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The Phenomenon Of Blue Fire In The Crater Ijen

Crater Ijen is an acidic crater lake located on top of Mount Ijen with 2,443 meters high above sea level to a depth of 200 meters and the area of the lake crater reached 5,466 hectares.


Burning sulfur on Kawah Ijen volcano in Indonesia. Fumaroles wind on daily 10 tons of volcanic gases from which condensed sulfur. The liqid sulfur is so hot that it began to burn in electric blue flames.

Olivier Grunewald’s dramatic photos showcase blue flames—not blue lava—that result from burning sulfur: