Kawah Ijen volcano, East Java - blue sulfur flames

Our expedition leader Andi visited Ijen crater during a period of elevated activity in May 2012, when lots of sulfur from the fumaroles was burning at night with blue and reddish flames, creating abstract photos.
The other photos are by our friends Jorge and Jessy who visited the volcano about 2 months later and give an impression of the volcano, known for its turquoise acid crater lake and the extensive sulfur mining.
Burning fumarole at night. (Photo: Andi Rosadi)
Burning fumarole at night. (Photo: Andi Rosadi) [info]
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Blue flames and red sparks are visible. (Photo: Andi Rosadi)
Blue flames and red sparks are visible. (Photo: Andi Rosadi) [info]
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The shape of a strange fiery demon? (Photo: Andi Rosadi)
The shape of a strange fiery demon? (Photo: Andi Rosadi) [info]
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Blue flames. Breathing was only possible with a good gas mask and staying near the burning sulfur was only possible for a very short time. (Photo: Andi Rosadi)
Blue flames. Breathing was only possible with a good gas mask and staying near the burning sulfur wa... [info]
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Blue and red flames at Ijen volcano. (Photo: Andi Rosadi)
Blue and red flames at Ijen volcano. (Photo: Andi Rosadi) [info]
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As day breaks, the blue light from the flames gets weaker and weaker and disappears. (Photo: Andi Rosadi)
As day breaks, the blue light from the flames gets weaker and weaker and disappears. (Photo: Andi Ro... [info]
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Ijen-Two miners on a rotating share/basis are always on duty tending the fires (Photo: jorge)
Ijen-Two miners on a rotating share/basis are always on duty tending the fires (Photo: jorge) [info]
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Ijen-Miners set fire to the sulphur to melt it (Photo: jorge)
Ijen-Miners set fire to the sulphur to melt it (Photo: jorge) [info]
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Ijen-The solidified sulphur is then broken into pieces for the miners to carry to the kantor, some 3km away (Photo: jorge)
Ijen-The solidified sulphur is then broken into pieces for the miners to carry to the kantor, some 3... [info]
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Ijen-Kawah Ijen crater by moonlight with fires burning (Photo: jorge)
Ijen-Kawah Ijen crater by moonlight with fires burning (Photo: jorge) [info]
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Ijen-Miners carry between 50Kg to 75Kg of sulphur (Photo: jorge)
Ijen-Miners carry between 50Kg to 75Kg of sulphur (Photo: jorge) [info]
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Ijen-At the plant, the blocks of sulphur are melted once again and filtered (Photo: jorge)
Ijen-At the plant, the blocks of sulphur are melted once again and filtered (Photo: jorge) [info]
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Ijen-The liquid sulphur is then spread on the floor where it re-solidifies (Photo: jorge)
Ijen-The liquid sulphur is then spread on the floor where it re-solidifies (Photo: jorge) [info]
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Kawah Ijen acid crater lake (East Java, Indonesia) (Photo: Tom Pfeiffer)
Kawah Ijen acid crater lake (East Java, Indonesia) (Photo: Tom Pfeiffer) [info]
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Kawah Ijen Crater, East Java, Indonesia (Photo: JessyEykendorp)
Kawah Ijen Crater, East Java, Indonesia (Photo: JessyEykendorp) [info]
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Dancing With The Light Of A Million Mornings
Kawah Ijen, East Java, Indonesia (Photo: JessyEykendorp)
Dancing With The Light Of A Million Mornings
Kawah Ijen, East Java, Indonesia (Photo: JessyEyke... [info]
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