Paris based photographer Olivier Grunewald has been documenting the Kawah Ijen volcano in Indonesia, where he observed dazzling electric blue fire can often be seen streaming down the mountain at night. Blue glow is unusual for a volcano on the island of Java. The blue glow is actually the light from the combustion of sulfuric gases, and some gases condense into liquid sulfur, which continues to burn as it flows down the slopes giving the feeling of lave flowing. I have never seen this much sulfur flowing at a volcano. Blue volcanic fire was described in antiquity in Italy on the south slope of Mount Vesuvius and on the island of Valcano.Blue flames may also be observed at the base of the plume of erupting volcanoes, when ash explosions occur. I did not use any filters to capture his images of the blue fire. The burning happens day and night, but it’s visible only in darkness. Source: National Geographic75879_990x742-cb1390850757 75880_990x742-cb1390850828 75881_990x742-cb1390850769 75877_990x742-cb1390850776 blue-lava-flames-grunewald-1_75878_990x742

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