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The Volcano That Burns Blue

The Kawah Ijen volcano in Java, Indonesia is a spectacular (and dangerous) sight to behold. Unlike any other volcano in the world, Kawah Ijen emits what appear to be bright blue flames. The glow is caused not by lava, but instead by sulfuric gases that create electric blue sparks when in contact with oxygen. Once the gases cool, bright yellow sulfur is formed, which is then mined and sold.


This story is a part of our Planet Earth series. From mammals to insects and birds to reptiles, we share this great big world with all manner of creatures, large and small. Come with us to faraway places as we explore our great big planet and meet some of its wildest inhabitants.

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