The Kawah Ijen volcano in Indonesia is well-known for its eerie blue lava. But what causes this blue coloration?
The blue color is caused by the presence of sulfuric gas. This gas is released when the magma is at a high temperature. When it comes into contact with the air, it forms sulfuric acid, which causes the blue coloration.
The blue lava can be seen streaming down the slopes of the volcano at night. It is a beautiful but deadly …