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Willekeurige foto 's

Ijen volcano by night (Nov 2014): blue flames and sulfur works

Ijen volcano in East Java is famous for its acid crater lake and the large sulfur deposits that form around very active fumaroles near the lake shore.
The sulfur in the crater is being mined. At night, some of the fumaroles are on fire, with intense bluish flames from burning sulfur. Partially, this is due to auto-ignition due to very high temperatures at the fumarole vents, but mostly because the workers set fire to the sulfur n order to melt it and collect it from the frozen puddles that then form on the ground below.
 

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