Stunning Electric-Blue Flames Erupt From Volcanoes

Burning sulfur forms lava-like rivers of light at Indonesia's Kawah Ijen volcano and other craters.
Indonesia's Kawah Ijen and other craters emit rivers of light from burning sulfur.

How Blue Lava Works and Where to See It

Project UAT — asylum-art: Stunning Electric-Blue Flames Erupt

Dandy Digs Unofficial

38 - Sub Specie Aeternitatis (Ijen Plateau, East Java, Indonesia) —

Watch: Stunning Electric-Blue Flames Erupt From Volcano In

How Blue Lava Works and Where to See It

Blue lava - Wikipedia

富士山流出蓝色火焰，不出3个月吞没日本？

Kawah Ijen Volcano