When sulfur-rich gases escape from the volcano’s cracks at temperatures reaching 600°C (1,112°F), they ignite upon contact with oxygen, producing vibrant blue flames.

Find Ijen Volcano Latest News, Videos & Pictures on Ijen Volcano and see latest updates, news, information from NDTV.COM. Explore more on Ijen Volcano.

[Steve Mould] came across an interesting little phenomenon of blue flames zipping around a circular track. This led to diving down a bit of a rabbit hole about excitable mediums, ultimately ...