![]() Unauthorized use is prohibited.Īs the burning gases cool, they deposit sulfur around the lake. Kawah Ijen volcano is the subject of a new documentary released earlier this month that was produced by Grunewald and Régis Etienne, the president of Geneva's Society of Volcanology. The burning happens day and night, but it's visible only in darkness. Grunewald did not use any filters to capture his images of the blue fire. "Blue flames may also be observed at the base of the plume of erupting volcanoes, when ash explosions occur," he added. The mineral has a relatively low melting point of 239☏ (115☌), and the temperature at the hot vents often exceeds that.īlue volcanic fire was described in antiquity in Italy on the south slope of Mount Vesuvius and on the island of Vulcano, Grunewald said. "When you go to Yellowstone, you can see their traces as black lines," she said.Īccording to Werner, it's relatively common to find molten sulfur around volcanic fumaroles (hot vents). Werner noted that forest fires in Yellowstone National Park have caused similar "rivers," as heat from the blazes melted the sulfur around hydrothermal vents. "I've never seen this much sulfur flowing at a volcano," she said. Geological Survey (USGS) at the Alaska Volcano Observatory, told National Geographic that Grunewald's photos show an unusual phenomenon. Some of the gases condense into liquid sulfur, "which continues to burn as it flows down the slopes," said Grunewald, "giving the feeling of lava flowing."Ĭynthia Werner, a research geologist with the U.S. When they come in contact with the air, they ignite, sending flames up to 16 feet (5 meters) high. ![]() Those gases emerge from cracks in the volcano at high pressure and temperature-up to 1,112☏ (600☌). The glow is actually the light from the combustion of sulfuric gases, Grunewald explained. "This blue glow-unusual for a volcano-isn't, of course, lava, as unfortunately can be read on many websites," Grunewald told National Geographic in an email about Kawah Ijen, a volcano on the island of Java. In the yellow part of a candle flame, you are seeing tiny particles of soot that are hot enough to glow yellow.įind more interesting articles and product information on our pros corner learning center pages.For several years Paris-based photographer Olivier Grunewald has been documenting the Kawah Ijen volcano in Indonesia, where dazzling, electric-blue fire can often be seen streaming down the mountain at night. Heat it more and it glows orange or yellow. If you heat up a piece of iron hot enough, it will glow red. The flame height will also differ depending on what type of media you use. As the embers and logs heat up, they take on a glow. As the flames go through the media and reflect off of logs and embers, soot and other small particles mix with the flame, affecting how the oxygen mixes with the burned gas. The second is the media used in your fire pit. Blue flames burn almost twice as hot as yellow flames. The fire will burn a blue color until all the air is purged from the gas lines. When you first start up your fire pit, there is a lot of air (oxygen) in the gas lines. The amount of oxygen is controlled by an air mixer on your fire pit. One is that blue flames indicate complete combustion of the gas. There are a couple of factors that cause your flames to look like this for a short period upon start-up. We often receive calls from homeowners asking “Why are there blue flames or the flames are hard to see when we first light our fire pit?”
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