KAWAH IJEN BLUE FIRE TOUR
Kawah Ijen volcano (2386m) is an active stratovolcano located on the eastern part of Java Island. The top of Ijen volcano is characterized by a very acidic crater lake containing 27.5 million m³ of turquoise-colored water. This lake is the biggest reservoir of hot and acidic water on Earth.
On the southern part of the lake, fumaroles are ejecting tons of sulfur every day. At night, this site is one of the only spot on Earth where it is possible to see blue fires. This is due to very hot gas coming from the volcanic conduits burning the sulfur, which leads to an extremely beautiful scenery. On the western part of the crater, a dam was build hundred years ago upstream of the Banyu Pahit river.
The blue fire is ignited sulphuric gas, which emerges from cracks at temperatures up to 600 degrees Celsius (1,112 degrees Fahrenheit). Those gases are directly originated from the magmatic chamber under the volcano. The flames can be up to 5 metres high; some of the gas condenses to liquid and is still ignited. It is the largest blue flame area in the world and one of the purest sulfur mine. Escaping volcanic gases are channelled through a network of ceramic pipes, resulting in condensation of molten sulfur. The sulphur, which is deep red in colour when molten, pours slowly from the ends of these pipes and pools on the ground, turning bright yellow as it cools. The miners break the cooled material into large pieces and carry it away in baskets. Miners carry loads ranging from 75 kilograms to 90 kilograms, up 300 metres to the crater rim, with a gradient of 45 to 60 degrees and Most miners make this journey twice a day.