Interesting Images
Eerie blue flames flared from the ground on Hawaii's Big Island on Tuesday night (May 22), marking a rarely seen phenomenon that can arise during volcanic eruptions. When red-hot lava buries plants and shrubs, the burning vegetation produces methane, a colorless gas that burns blue, according to the U.S. Geological Survey (USGS).
When methane is heated, it can seep into voids below the surface — in this case, the cracks on Kahukai Street in the residential area of Leilani Estates. Heated methane can explode, but when it was ignited on Tuesday night, its blue flames simply burned out of the fractures in the road, several feet away from the lava, the USGS reported.
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