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Thousands of degrees Fahrenheit

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  • Now we’re talking a lot more heat. Lava, the melted rock that shoots out of volcanoes, can flow at temperatures of thousands of degrees Fahrenheit. Lava that’s on the cooler side comes out of volcanoes at only pizza oven-like temperatures of 570 F, according to the United States Geological Survey (USGS).

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  • What is the temperature of ultramafic lava?

  • Ultramafic lavas such as komatiite are rich in magnesium and have the highest temperatures. It is believed that such lavas erupted at temperatures of 1,600 C (2,910 F). At such temperatures, the lava viscosity is as low as water! However, there have been no modern ultramafic eruptions, with only a few occurring in the past 500 million years.