As Hawaii's Kilauea's volcano continues to erupt, blue flames are being created from burning methane, which were seen in nighttime photos released yesterday (May 23rd) by the U.S. Geological Survey. The flames were shown coming from cracks in the pavement in the Leilani Estates neighborhood, where the volcano has been pushing out lava for the past three weeks. The methane is produced when hot lava buries and burns plants and trees. It can then seep through cracks and cause explosions when it's ignited underground. Kilauea has opened more than 20 fissures in the ground through which lava, sulfur dioxide and steam have been coming out, and lava has been pouring down the volcano and into the ocean miles away