Blue lava
Optical phenomenon resulting from burning sulfur
Blue lava
Blue lava, also known as (Indonesian: Api Biru), and simply referred to as blue fire or sulfur fire, is a phenomenon that occurs when sulfur burns. It is an electric-blue flame that has the illusory appearance of lava. Despite the name, the phenomenon is actually a sulfuric fire that resembles the appearance of lava, rather than actual lava from a volcanic eruption. The most well-documented of these fires occur on Indonesia's Kawah Ijen volcano, where they regularly burn.
Read on Wikipedia · Image Thomas Fuhrmann, CC BY-SA 4.0
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