This is a question & reply written by the X class of the John Trecroci hotel institute of Villa San Giovanni (Reggio Calabria) for Evidence Network Academy.
Vulcan lava cannot be blue, it is just a beautiful optical illusion. The phenomenon of “Blue Lava” It is due to the combustion of sulfuric gases that emerge at a very high pressure, between 500 and 600 ° C, which in contact with oxygen burn very quickly creating a sapphire illusion, visible only at night. This is the case of the Caldera Kawah Ljen volcano. It is an inactive volcano on the Indonesian island of Java, formed more than 50,000 years ago, whose basin hosts a crater lake with turquoise waters, but the most acidic in the world, capable of dissolving metals and being extremely harmful to living beings.
All over the world. Volcani from the “blue lava” also exist in Ethiopia and Hawaii, real mortal traps for living beings since, in addition to acid sources, temperatures can reach about 60 ° C.
