Indonesia' Kawah Ijen Volcano produces blue lava, which glows at night. This is due to the combustion of sulfuric gases when they meet air temperatures exceeding 239 degrees Fahreneit (115 degrees Celsius). The volcano is part of a group of stratovolcanoes—volcanoes built up by layers of hardened ash, lava, and other materials—called the Ijen volcano complex. Since the volcano produces large amounts of sulfur, and despite the high-level of toxicity in the area, sulfur mining takes place in the area.
More about volcanoes:
- Lava flows can reach more that 2,000 degrees Fahrenheit (1,250 Celsius).
- Italy's Mt. Etna is supposedly the world's oldest volcano with its first recorded eruption in 1500 BC. The world's youngest volcano located in Paricutin, Mexico with its first eruption in February 1943.
- The majority of the world's volcanoes, nearly 90%, exist within the Ring of Fire that runs along the edges of the Pacific Ocean.
