15th Annual Smithsonian.com Photo Contest
The Nyiragongo volcano has the biggest permanent lava lake on Earth. After sunset, the red glow of the lava mixes with the blue of the sky, which creates this purple cloud. At the same time, the crater becomes red. These effects only last for a few seconds.
© florent mamelle.
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||Nov. 30, 2017, 10:38 a.m.