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.

Tourists and residents have been evacuated as a volcano erupted in south-west Iceland, threatening a town and popular ...

Down below, the car park at Iceland's world-famous Blue Lagoon was engulfed in lava. Hotel guests and nearby homes were evacuated but authorities said there was no threat to air travel in the region.