Sometimes it’s good to have the blues 😍🌋💙 The electric-blue light from the Kawah Ijen volcano in Indonesia is visible only in the darkness. #ParadiseIslands | National Geographic Animals

The Blue Flames Aren’t Lava—They’re Burning Sulfur At Kawah Ijen in Indonesia, rivers of glowing electric blue light flow down the volcano at night. Despite appearances, this isn’t molten rock—it’s liquid sulfur burning at about 1,110°F (600°C) as it ignites on contact with air. The rare phenomenon occurs where sulfur-rich gases escape and condense into liquid before igniting. Important Details: • Known as “blue lava” phenomenon • Actually burning liquid sulfur • Temperature around 1,110°F • Vis

El azufre en combustión desprende espectaculares llamas azules en el volcán Kawah Ijen, en la isla indonesia de Java, que solo son visibles de noche. | Revista National Geographic en español

The Phenomenon of Blue Lava Despite its name, blue lava isn't actually molten rock glowing blue. It's a breathtaking visual effect found at the Kawah Ijen volcano in Indonesia. This stunning blue color is caused by the combustion of high-pressure sulfuric gases. As these gases escape from volcanic vents and come into contact with oxygen-rich air, they ignite and burn with a vibrant, electric blue flame. This spectacular "blue fire" can be seen flowing down the volcano's slopes, creating the illu