Volcanoes are the center of folklore and myth wherever they exist. These fiery mountains prone to unexpectedly erupting in cascades of lava and ash have inspired and frightened humans for centuries. However, there is one volcano that has a reputation that surpasses all others, Indonesia’s Kawah Ijen volcano, otherwise known as the blue volcano.
The active Kawah Ijen Volcano is part of a complex of volcanoes in Banywang Regency, Java. This popular complex is situated within Ijen crater with stratovolcano Gunung Merapi as the highest point. It is one of the world’s most unusual volcanoes because instead of producing the usual red lava and black smoke, its underground activities result in bright blue flames rising into the air. Some people even call it electric blue fire. Since it was mentioned on TV (National Geographic to be precise) the number of tourists who travel to East Java and Indonesia has significantly increased.
The phenomenon is caused when the volcano’s sulfuric gases come into contact with air temperature above 360°C. The Ijen volcano complex has some of the highest levels of sulfur in the world. This dense collection of the gas, when exposed to oxygen and lit by the molten hot lava burns blue. Unlike regular volcanoes whose bright red lava is visible in the day, Kawah Ijen’s blue burning flames can only be seen at night. “The vision of these flames at night is strange and extraordinary,” Photographer Olivier Grunewald says. “After several nights in the crater, we felt really living on another planet.”
Here you can also find the largest acid lake in the world which is conveniently situated within the crater. While the turquoise water of this crater lake is quite spectacular, it can also threaten your life.